tag:blogger.com,1999:blog-80738788042232604142024-03-16T09:09:06.147+08:00Physics for O-LevelIGCSE Yrs 10/11 n SPM students. (Published By: Douglas Tan of PJ, Selangor, Malaysia)MR. Tan (tutortan1@gmail.com)http://www.blogger.com/profile/14597183604923036693noreply@blogger.comBlogger69125tag:blogger.com,1999:blog-8073878804223260414.post-46427807827912478972020-01-18T19:41:00.000+08:002020-01-21T10:09:34.623+08:00Ng Yu Kai (Sri KL) Scored A (88%) in IGCSE Physics 0625 in Winter 2019 Exams. <div dir="ltr" style="text-align: left;" trbidi="on">
18.01.2020 (PJ):<br />
<br />
Two days ago , Ng Yu Kai of Sri KL Int'l School - who took IGCSE Physics 0625 tuition from me - texted to say that he scored 88% (A) for the subject in the Oct/Nov 2019 exams.<br />
<br />
His 1st physics tuition lesson with me was on 30/06/2019 in which he told me he had not been doing well and had been struggling to pass physics all these while.<br />
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We started with 'Electricity, Electro-magnetism and Electronics" - the chapters he was dealing with in school then; then 'Atomic Physics'. His score for these chapters were near perfect in the mock/final exams - however, the scores for the chapters not yet covered by my tuition were quite a disaster. Overall, his score for physics in the mock/final exams were only 50% (pls see his texted msg below)<br />
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So, I need to do what I got to do as time was running out - to brush him up on the areas not yet covered. And, the final score in the formal exams in Oct/Nov 2019 was: A (88%).<br />
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Heartiest congrats to him!<br />
<br />
Don't forget to work doubly hard in foundation/A-level because I have seen students who did well in IGCSE-level but not so well in CIE or IB Diploma level mainly because of over-confidence - 1 month holidays means 1 month break from study/tuition totally. 10-day break shd be enough - when the going gets tough, the tough must get going!<br />
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Haha, here are his texted messages to me on the result-day (16.01.2020) and I will post his result-slip here when I receive it. :)<br />
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MR. Tan (tutortan1@gmail.com)http://www.blogger.com/profile/14597183604923036693noreply@blogger.com0tag:blogger.com,1999:blog-8073878804223260414.post-52666008269308409512020-01-16T16:05:00.000+08:002020-02-07T14:00:27.163+08:00General Formula to Find n-th Term of Any Diagonal/Oblique Series of Binomial Coefficients in the Pascal/Yang Hui Triangle<div dir="ltr" style="text-align: left;" trbidi="on">
<span style="background-color: white; color: #333333; font-family: "arial" , "tahoma" , "helvetica" , "freesans" , sans-serif; font-size: 14.85px;">Hello Folks,</span><br />
<br />
Permit me to make a post on math in this physics blog.<br />
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27.01.2020 (2nd update, PJ Selangor, Malaysia).<br />
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It is for math enthusiasts - not for students preparing to sit for IB math or IGCSE Math 0580, 0606, 0607 or CIE Math 9709 or Math 9231. Of course, students who would like to know more than what is specified in their exam syllabus are welcome!<br />
<span style="background-color: white; color: #1c1e21; font-family: "helvetica" , "arial" , sans-serif; font-size: 14px;"><br /></span>
<span style="background-color: white; color: #1c1e21; font-family: "helvetica" , "arial" , sans-serif; font-size: 14px;">It is about my general formula /equation, N = (n...n+(p-1))!/p!, that can work-out:</span><br />
<div style="background-color: white; color: #1c1e21; font-family: helvetica, arial, sans-serif; font-size: 14px; margin-bottom: 6px; margin-top: 6px;">
<br />
1) the individual formula for the oblique/diagonal number series in Pascal /Yang Hui triangle<br />
2) the value of any n-th term in the oblique/diagonal number series in the triangle.<br />
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The Pascal /Yang Hui triangle:</div>
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You see, currently, students of binomial theorem know that the horizontal series of numbers /binomial coefficients can be found by using binomial <span class="text_exposed_show" style="display: inline; font-family: inherit;">theorem or, to a limited extent, the Pascal /Yang Hui triangle.</span></div>
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<span class="text_exposed_show" style="display: inline; font-family: inherit;">What about the terms in the oblique/diagonal series of binomial coefficients?</span></div>
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As you can see from the triangle above, the binomial, say (x + y) or (a + b):</div>
<div style="font-family: inherit; margin-bottom: 6px; margin-top: 6px;">
- to the power 1 yields an oblique number /binomial coefficient series called 'natural numbers': 1 + 2 + 3 + 4 + ... + n, where the n-th term = n;</div>
<div style="font-family: inherit; margin-bottom: 6px; margin-top: 6px;">
- to the power 2 yields an oblique number /BC series called triangular number series of: 1 + 3 + 6 + 10 + 15 + ... + n, where the n-th term =n ( n+1)/2;</div>
<div style="font-family: inherit; margin-bottom: 6px; margin-top: 6px;">
- to the power 3 yields a diagonal number /BC series called tetrahedral number series of: 1 + 4 + 10 + 20 + ... + n, where the n-th term = n(n+1)(n+2)/6;</div>
<div style="font-family: inherit; margin-bottom: 6px; margin-top: 6px;">
- to the power 4 yields a diagonal number /BC series called pentatope number series: 1 + 5 + 15 + 35 + ... + n, where the n-th term = n(n+1)(n+2)(n+3)/24;<br />
<br />
- to the power 5 yields the 5-simplex number series: ....</div>
<div style="font-family: inherit; margin-bottom: 6px; margin-top: 6px;">
<br />
The n-th term formula for each oblique/diagonal bc series is currently analysed]and work-out individually - but I saw a pattern that led me to a general formula <span style="font-family: inherit;">that can be used:</span><br />
<span style="font-family: inherit;"><br /></span>
<span style="font-family: inherit;">1) to work-out the individual formula for the n-th term of any oblique/diagonal number /BC series; and hence </span><br />
<span style="font-family: inherit;"><br /></span>
<span style="font-family: inherit;">2) to find the value of any n-th term in any oblique/diagonal BC series in the Pascal / Yang Hui triangle. </span><br />
<span style="font-family: inherit;"><br /></span>
<span style="font-family: inherit;">I have googled /searched far and wide and it seems that no one had found it before!. .</span><span style="font-family: inherit;">.</span></div>
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<b style="font-family: Helvetica, Arial, sans-serif;"><u>The General Formula</u></b><br />
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<span style="font-family: inherit;">N = (n...n+(p-1))!/p!</span></div>
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where,</div>
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1) n refers to the n-th term of the diagonal bc series generated by the binomial to the power p;</div>
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2) (n...n+(p-1))! refers to an 'up factorial" idea introduced n developed by me, where,</div>
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- an up factorial that starts with n and ends with n is:<br />
(n...n)! = n</div>
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- an up factorial that starts with n and ends with (n+1) is:<br />
(n...n+1)! = n(n+1)</div>
<div style="font-family: inherit; margin-bottom: 6px; margin-top: 6px;">
- an up factorial that starts with n and ends with (n+2) is:<br />
(n...n+2)! = n(n+1)(n+2); and, so on.</div>
<div style="font-family: inherit; margin-bottom: 6px; margin-top: 6px;">
3) p! refers to the conventional down factorial which starts with p and ends with 1. Thus,</div>
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p! = p(p-1)(p-2)x...x3x2x1</div>
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5! = 5x4x...x2x1</div>
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1! = 1</div>
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0! = 1</div>
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In the Pascal/Yang Hui triangle (please see above):</div>
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When the power p=1, a natural number series (1+2+3+4+5+...+n) is generated. And, using the general formula<br />
N = (n...n+(p-1))!/p! = (n...n+(1-1))!/1! = (n...n)!/1! = n i.e. N = n</div>
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When p=2, a triangular number series (1+3+6+10+15+21+...+n) is generated. And, using the general formula<br />
N = (n...n+(p-1))!/p! = (n...n+1)!/2! = n(n+1)/(2x1) = n(n+1)/2 i.e. N = <span style="font-family: inherit;">n(n+1)/2</span></div>
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When p=3, a tetrahedral number series (1+4+10+20+35+...+n) is generated. And, using the general formula<br />
N = (n...n+(p-1))!/p! = (n...n+2)!/3! =n(n+1)(n+2)/6 <span style="font-family: inherit;"> </span><span style="font-family: inherit;">i.e. N = </span><span style="font-family: inherit;">n(n+1)(n+2)/6</span><span style="font-family: inherit;"> </span></div>
<div style="font-family: inherit; margin-bottom: 6px; margin-top: 6px;">
When p=4, a number series (1+5+15+35+70+...+n) is generated. And, using the general formula<br />
N = (n...n+(p-1))!/p! = (n...n+3)!/4! = n(n+1)(n+2)(n+3)/24 i.e. N = <span style="font-family: inherit;">n(n+1)(n+2)(n+3)/24</span></div>
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And, so on...for p = 5, p = 6,...<br />
<br /></div>
<div style="font-family: inherit; margin-bottom: 6px; margin-top: 6px;">
Hence, the General Formula, N = (n...n+(p-1))!/p!, is capable of finding out:<br />
<br />
<span style="font-family: inherit;">1) the individual n-th term formula for any oblique/diagonal number or binomial coefficient series </span><span style="font-family: inherit;">s in the Pascal /Yang Hui triangle</span><span style="font-family: inherit;"> - by just substituting the p value into the general formula; and,</span><br />
<span style="font-family: inherit;"><br /></span>
<span style="font-family: inherit;">2) the value of any n-th term in any oblique/diagonal series of binomial coefficients in the Pascal /Yang Hui triangle - by substituting the n-th value into the individual formula obtained by substituting p!</span><br />
<span style="font-family: inherit;"><br /></span></div>
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You'll note that to generate the General Formula, I have to introduce the idea and notation of an 'up factorial'.<br />
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Hahaha, c<span style="font-family: inherit;">ritical comments, anyone?</span></div>
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MR. Tan (tutortan1@gmail.com)http://www.blogger.com/profile/14597183604923036693noreply@blogger.com0tag:blogger.com,1999:blog-8073878804223260414.post-868443009471729662019-12-16T19:21:00.002+08:002019-12-18T22:49:56.528+08:00Will Ivy-League Universities Ever Accept An Average Student?<div dir="ltr" style="text-align: left;" trbidi="on">
I chanced upon this question in Quora and the answer provided by someone who seemed to have experience working with 'average' student who got admitted into Ivy-league varsity. His answer may be of interests to any regular student-readers of my blog (this blog) who somehow failed to get the excellent results for Ivy-league entry that they were aiming for in the first place - say, due to being sick on exams day.<br />
<br />
Hope this helps:<br />
<br />
<div class="answer_user" style="background-color: white; color: #333333; font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", sans-serif; font-size: 15px;">
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<span id="wLm3Ah1N85"><span id="wLm3Ah1N90"><span class="" id="__w2_wLm3Ah1N91_link"><a action_mousedown="UserLinkClickthrough" class="user" href="https://www.quora.com/profile/Eric-Eng-3" id="__w2_wLm3Ah1N91_name_link" style="background: transparent; color: #333333; text-decoration-line: none;">Eric Eng</a></span></span><span class="NameCredential">, Founder of IvyCollegeAdmit (www.ivycollegeadmit.com)</span></span></div>
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<span class="credibility_wrapper"><span id="wLm3Ah1N92"><a action_mousedown="AnswerPermalinkClickthrough" class="answer_permalink" href="https://www.quora.com/Will-Harvard-ever-accept-an-average-student/answer/Eric-Eng-3" id="__w2_wLm3Ah1N93_link" rel="nofollow" style="background: transparent; text-decoration-line: none;">Updated Jan 7</a></span><span class="bullet"> · </span>Upvoted by <span id="wLm3Ah1N99"><span class="" id="__w2_wLm3Ah1N100_link"><a action_mousedown="UserLinkClickthrough" class="user" href="https://www.quora.com/profile/Woody-Hancock" id="__w2_wLm3Ah1N100_name_link" style="background: transparent; text-decoration-line: none;">Woody Hancock</a></span></span>, <span class="bio" style="border-bottom: 1px solid rgb(226, 226, 226);">studied at Harvard University</span><span class="and"> and </span><span id="wLm3Ah1N102"><span class="" id="__w2_wLm3Ah1N103_link"><a action_mousedown="UserLinkClickthrough" class="user" href="https://www.quora.com/profile/Carla-Mortensen" id="__w2_wLm3Ah1N103_name_link" style="background: transparent; text-decoration-line: none;">Carla Mortensen</a></span></span>, <span class="bio" style="border-bottom: 1px solid rgb(226, 226, 226);">MTS Applied Theology, Harvard University (1979)</span></span></div>
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<span class="ui_qtext_rendered_qtext" style="tab-size: 4; word-break: break-word;">I’ve seen students with perfect 1600 (or 2400) SAT scores and 4.0 GPA’s get turned down by the Ivies. I’ve also helped and worked with lower achieving students with 1800 (out of 2400) SAT scores and 3.3 GPA get accepted into an Ivy League (<b>Yes, 3.3 GPA - you heard that right - and he was Asian American too</b>).</span></div>
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<span class="ui_qtext_rendered_qtext" style="tab-size: 4; word-break: break-word;">What it all comes down to is how you demonstrate your personal qualities, leadership, and commitment to your community through the application. This takes the form of personal statements, extracurricular activities, and recommendation letters that help the admissions officers determine whether to accept or reject you.</span></div>
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<span class="ui_qtext_rendered_qtext" style="tab-size: 4; word-break: break-word;">The biggest mistake that students make is not taking their application seriously enough. This tends to happen with overachievers, who believe that their grades, test scores, and even national academic awards are enough to get them in.</span></div>
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So yes, do pursue your passions and your interests, and work as hard as you can during your four years of high school. Just remember to capture and express all of your personal qualities in the college application itself, and write a genuine, palpable personal statement that helps the admissions officers understand the qualities that define you.</div>
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Because at the end of the day, the bitter truth is that admissions to Ivy League schools is highly dependent on how well you present yourself on paper and draft your personal statement.</div>
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Please read my blog on what the Ivy Leagues are looking for:</div>
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<span class="qlink_container" style="direction: ltr; unicode-bidi: isolate;"><a class="external_link" data-qt-tooltip="ivycollegeadmit.com" href="https://www.ivycollegeadmit.com/the-biggest-misconception-about-college-admissions/" rel="noopener nofollow" style="background: url("//qsf.fs.quoracdn.net/-3-images.new_grid.external_link.svg-26-7f84ed22dfd7e97b.svg") 100% 50% / 10.5px no-repeat transparent; color: #2b6dad; padding-right: 15px; text-decoration-line: none;" target="_blank">The Biggest Misconception About College Admissions - Ivy College Admit</a></span></div>
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<a class="external_link" data-qt-tooltip="ivycollegeadmit.com" data-tooltip="attached" href="https://www.ivycollegeadmit.com/the-personal-statement-the-holy-grail-of-college-admissions/" rel="noopener nofollow" style="background-attachment: initial; background-clip: initial; background-image: url("//qsf.fs.quoracdn.net/-3-images.new_grid.external_link.svg-26-7f84ed22dfd7e97b.svg"); background-origin: initial; background-position: 100% 50%; background-repeat: no-repeat; background-size: 10.5px; color: #2b6dad; font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", sans-serif; font-size: 15px; padding-right: 15px; text-decoration-line: none;" target="_blank">The Personal Statement: The Holy Grail of College Admissions - Ivy College Admit</a> </div>
MR. Tan (tutortan1@gmail.com)http://www.blogger.com/profile/14597183604923036693noreply@blogger.com0Unknown location.50.715591289747 -133.7640384609375125.193556789747003 -175.07263246093751 76.237625789747 -92.455444460937514tag:blogger.com,1999:blog-8073878804223260414.post-87660546466513354032019-08-16T08:12:00.001+08:002019-12-16T13:37:24.672+08:00Nicole Gan Scored A (87%) for CIE A2 Chemistry 9701 in May/June 2019 Exams<div dir="ltr" style="text-align: left;" trbidi="on">
Nicole Gan scored a very respectable strong A (87%) - worthy of special mention in a dedicated blog post - for her CIE (A-level) Chemistry 9701 <b>A2</b> (Yr 13) in May/June 2019 exams.<br />
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For CIE <b>AS</b> (Yr 12) May/June 2018 exams for the same subject - she scored 88% (strong A too).<br />
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A-level is certainly much tougher that O-level.<br />
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So folks, while preparing for your O-level, do acquire strong analytical skill to carry into your A-level. Nicole has it - that's why she could score a strong A. If you are too easy-going (like 1-month holidays means 1 month off from study totally) or over-confident due to excellent O-level results, you may end up finding A-level tough and the results will show. What more when you enter university?! Put in more effort as you go higher.<br />
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With that, my heartiest congrats to Nicole n I wish Nicole the very best in her next chapter in life. May she get into the British university of her choice to do a course of her liking. Once again, congrats!<br />
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Sincerely,<br />
Douglas.<br />
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P/s:<br />
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In IGCSE (O-Level) , Nicole (Nobel Int'l Sch) took tuition in 3 subjects from me and her scores in the<b><u> 2016 Oct/Nov exams</u></b>:<br />
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1) <b>Chemistry 0620</b>:<b> A* (94%)</b><br />
2) <b>Physics 0625: A* (93%)</b><br />
3) <b>Add-Maths 0606: A (83%)</b> - I actually expected her to score A* for Add-Maths based on her usual performance during tuition with me - but she told me she was panicky for the 1st paper. When she wasn't panicky for her AS-level Maths (CIE), she scored A* (94%) with no tuition from others! :)<br />
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The best time to get tuition slot(s) from me is in June/July and Nov/Dec - just after the Summer and the Winter exams - when students who just finish their exams vacate their tuition slots.<br />
<b><br /></b>
<b>My WA # 011-2120 1608</b><br />
<b><br /></b><b>My email: tutortan1@gmail.com</b></div>
MR. Tan (tutortan1@gmail.com)http://www.blogger.com/profile/14597183604923036693noreply@blogger.com0tag:blogger.com,1999:blog-8073878804223260414.post-43376341430960784312019-08-13T22:07:00.002+08:002019-12-16T13:49:35.560+08:00Natalia Lim Scored A (88%) for IGCSE Add-Maths 0606 in June 2019 Exams<div dir="ltr" style="text-align: left;" trbidi="on">
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhiDpdlaU3022Sxw971u917iokiyvV4WJO4Mty-LVX5vvO8a3WuP8Ua5OH6dMfSQhQ9F-ZY3grh7DK5et8r_qaf2DRBIomwtgIANLmvua-fR5MSUVKl2xhJbUZ5cgPlIbU6vsOtG1KazYSI/s1600/Natalia-Add-Maths.Result.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="607" data-original-width="1080" height="221" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhiDpdlaU3022Sxw971u917iokiyvV4WJO4Mty-LVX5vvO8a3WuP8Ua5OH6dMfSQhQ9F-ZY3grh7DK5et8r_qaf2DRBIomwtgIANLmvua-fR5MSUVKl2xhJbUZ5cgPlIbU6vsOtG1KazYSI/s400/Natalia-Add-Maths.Result.jpg" width="400" /></a></div>
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<b>Natalia</b> was a home-schooled student - she was either taught by her mum or a tutor like me (for subject like IGCSE Physics 0625).<br />
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<b>This year (May /June 2019):</b> She sat for 2 more subjects - <b>IGCSE Add-Maths 0606</b> n Economics (taught, I think, by her capable mum) and<b> she scored A</b> for both (<b>88% for Add-Maths</b>) - results slip above.<br />
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<b>Last year (Oct /Nov 2018):</b> Natalia sat for 4 subjects - all of which she obtained A or A*. The subject that she took tuition from me was <b>IGCSE Physics 0625</b> and <b>she scored A* (90%)</b> - please see an earlier congratulatory blog-post on this.<br />
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Heartiest congrats to Rachel n Natalia - it's A* or A for all subjects! :)<br />
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P/s:<br />
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1) Natalia's Mum has since recommended NC (of Gdn Int'l Sch, daughter of her medical-doctor friends) to take tuition from me for the IGCSE subjects of Physics 0625 and Add-Maths 0606 at the same hourly fees as Natalia's (RM100/hr + RM30 per to-and-return Ampang trip).<br />
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2) <b>Available tuition slots</b>: If you need tuition slot(s), the best time to get them from me will be immediately after Summer or Winter exams in June/July and November/December respectively.<br />
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<b>WhatsApp me</b> at:<b> 011-2120 1608</b>.<br />
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MR. Tan (tutortan1@gmail.com)http://www.blogger.com/profile/14597183604923036693noreply@blogger.com0tag:blogger.com,1999:blog-8073878804223260414.post-54507918090078297232019-06-16T21:34:00.000+08:002020-02-28T21:50:27.244+08:00 IGCSE Physics 0625: Douglas Tan's Tuition Students Who Scored A or A*<div dir="ltr" style="text-align: left;" trbidi="on">
<b>Douglas Tan's tuition students who scored A* or A in IGCSE Physics 0625 (or, Edexcel Int'l GCSE Physics (4PMO)):</b><br />
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<b>1) Oct /Nov 2019 exams: A (88%) - Ng Yu Kai (Sri KL Int'l School)</b><br />
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<b>2) Oct /Nov 2018 exams: </b><b>A* (92%) - </b><b>May Lee May Chin (Beacon Hse Sri Inai)</b><br />
<b><br /></b><b>3) Oct /Nov 2018 exams: </b><b>A* (90%) - </b><b>Natalia Lim (Home School))</b><br />
<b><br /></b><b>4) May /June 2017 exams: </b><b>A (88%) - </b><b>Nazeera Shafleena (Sri Cempaka)</b><br />
<b><br /></b><b>5) Oct /Nov 2016 exams: </b><b>A* (93%) - </b><b>Nicole Gan (Nobel Int'l Sch.)</b><br />
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<b>6) May /June 2016 exams: </b><b>A* (90+%) - </b><b>Lim Jin Quan (Sri Cempaka)</b><br />
<b><br /></b><b>7) Before 2016: </b><b>A or A* -</b><b> Karina Hamzah (Garden Int'l Sch), Alistair Yong (Honsbridge), Angela Loo (Honsbridge) and more ... (drop me a note if I inadvertently miss you out)</b><br />
<b><br /></b><b>8) May /June 2017 Edexcel GCSE exams </b><b>Physics (4PHO)</b><b>: </b><b>A* - </b><b>Caroline McLean </b><br />
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You may refer to the dedicated blog posts<b> in this blog </b>for<b> their 'thank you' notes, result slips n /or WhatsApp messages </b>to me on their results. :)<br />
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<b>-----------------------------------------------------------------------------</b><br />
<b><br /></b><b>Available tuition slots: </b>The best time to get tuition slot(s) from Douglas is in June/July and Nov/Dec - just after Summer or Winter exams - when students who just finish their exams vacate their slots.<br />
<b><br /></b><b>Douglas' WA # 011-2120 1608</b><br />
<b><br /></b><b>Douglas' email: tutortan1@gmail.com</b><br />
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MR. Tan (tutortan1@gmail.com)http://www.blogger.com/profile/14597183604923036693noreply@blogger.com0tag:blogger.com,1999:blog-8073878804223260414.post-89999834625849994942019-06-16T21:20:00.001+08:002020-02-28T21:52:58.309+08:00 IGCSE Chemistry 0620: Douglas Tan's Tuition Students Who Scored A or A*<div dir="ltr" style="text-align: left;" trbidi="on">
<b>Douglas' tuition students who scored A* or A in IGCSE Chemistry 0620 (or, Edexcel Int'l GCSE Chemistry (4CHO)):</b><br />
<b><br /></b>
<b>1) Oct /Nov 2018 exams: </b><b>A* (94%) - </b><b>May Lee May Chin (Beacon Hse Sri Inai) </b><br />
<b><br /></b>
<b>2) Oct /Nov 2017 exams: </b><b>A (80+%) - </b><b>Matthew Sia (Beacon Hse Sri Inai) </b><br />
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<b>3) May /June 2017 exams: </b><b>A (88%) - </b><b>Nazeera Shafleena (Sri Cempaka) </b><br />
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<b>4) Oct /Nov 2016 exams: </b><b>A* (94%) - </b><b>Nicole Gan (Nobel Int'l Sch.) </b><br />
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<b>5) May /June 2016 exams: </b><b>A* (90+%) - </b><b>Lim Jin Quan (Sri Cempaka) </b><br />
<b><br /></b>
<b>6) Before year 2016: </b><b>A or A* -</b><b> Karina Hamzah (Garden Int'l Sch), Shannon Khoo (Honsbridge), Angela Loo (Honsbridge), Kimberly (home-school) and more...(if I inadvertently miss out anyone, kindly let me know.)</b><br />
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<b>7) May/June 2017 Edexcel GCSE exams: </b><b>Chemistry (4CHO),</b><b> </b><b>A*- </b><b>Caroline McLean</b><br />
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You may refer to the dedicated blog posts in this blog for<b> their 'thank you' notes, result slips n /or WhatsApp messages </b>to me on their results. :)<br />
<br />
<b><i>--------------------------------------------------</i></b><br />
<b><i><br /></i></b><b>Available tuition slots: </b>The best time to get tuition slot(s) from me is in <b>June/July or Nov/Dec</b> - just after the Summer and the Winter exams - when students who just finish their exams vacate their tuition slots.<br />
<b><br /></b><b>Douglas' WA # 011-2120 1608</b><br />
<b><br /></b><b>Douglas' email: tutortan1@gmail.com</b><br />
<br /></div>
MR. Tan (tutortan1@gmail.com)http://www.blogger.com/profile/14597183604923036693noreply@blogger.com0tag:blogger.com,1999:blog-8073878804223260414.post-26095834823795379432019-03-11T23:10:00.000+08:002019-12-16T14:20:05.982+08:00Douglas Tan's Teaching Profile<div dir="ltr" style="text-align: left;" trbidi="on">
This Teaching Profile summarizes my teaching and private tutoring experience and achievements up to Year 2016. Thereafter (2017 - 2019), students' achievements are recorded through individual dedicated posts in this blog:<br />
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<b>The best time to get tuition slot(s) from me is in June/July or Nov/Dec - just after the Summer and the Winter exams - when students who just finish their exams vacate their tuition slots.</b><br />
<b><br /></b>
<b>My WA # 011-2120 1608</b><br />
<b><br /></b>
<b>My email: tutortan1@gmail.com</b><br />
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MR. Tan (tutortan1@gmail.com)http://www.blogger.com/profile/14597183604923036693noreply@blogger.com0tag:blogger.com,1999:blog-8073878804223260414.post-1495632918090652762019-01-17T19:38:00.001+08:002019-12-05T16:30:44.377+08:00May Lee Scored A* for Both Physics (92%) and Chemistry (94%) in IGCSE Oct /Nov 2018 Exams<div dir="ltr" style="text-align: left;" trbidi="on">
(Updated on 05/01/2019)<br />
<br />
Yeah, more great news!<br />
<br />
A moment ago, May Lee whatsapped: "I get 94 for chemistry and 92 for physics" followed by a 'thank you note' - please see the photoshot. And, I thank her for her kind words.<br />
<br />
May Lee took tuition on Physics 0625 and Chemistry 0620 from me for about 16 months - 1.5 hours for each subject. The 2 subjects were done one after another - totaling 3 hours in 1 session firstly on Saturday, then changed to Sunday. You will note later that her tuition hours for Physics were increased by 1.5 hours about 3 months before her exams because she obtained only 70+ for Physics in her mock exams.<br />
<br />
And, her parents - upon noticing her non-A score for Physics - on their own without my request, increased her tuition hours by 1.5 hrs / week about 3 months before the exams - the additional 1.5-hr gave me more time to help her. Students usually take 2-hr tuition for subjects like Physics, Add-Math n Chemistry for at least 15 months to excel in the subjects.<br />
<br />
So, finally she scored A* for both Chemistry (94%) n Physics (92%).<br />
<br />
Warmest congrats n best wishes to May Lee! :)<br />
<br />
Sincerely,<br />
Douglas Tan<br />
<br />
WA: 011-2120 1608<br />
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MR. Tan (tutortan1@gmail.com)http://www.blogger.com/profile/14597183604923036693noreply@blogger.com0tag:blogger.com,1999:blog-8073878804223260414.post-23092614999938239682019-01-17T15:05:00.002+08:002019-12-05T22:00:43.648+08:00Natalia Lim JX Scored A* for IGCSE Physics 0625 in 2018 Oct /Nov Exams<div dir="ltr" style="text-align: left;" trbidi="on">
Yeah, good news from Natalia's Mom!<br />
<br />
Rachel just whatsapped me Natalia's IGCSE full results slip with the following words "...Mr Douglas - you are the best ... Your reputation as a great physics teacher is proven once again" - it's an A* for Natalia who never learn physics before and never from any one else but me - her sole physics tutor. In fact, Natalia scored at least an A for all the subjects she took!<br />
<br />
Natalia and her siblings are all home-school students with a very capable and dedicated Mom. Dad is a very nice man - a corporate lawyer. Elder sisters are mostly in Canada - holding Master n PHD. It's an honour really to get to know this Christian family which was why I was impressed enough to buy her a farewell "Thank You" cake on my last lesson with her. Her mom was surprised n remarked that: "We should be the one thanking you!" n presented me with chocolates n tarts bought from, I think, Taiwan. The family has many lovely dogs - some of which were previously stray dogs - but you couldn't tell from their current loveliness! :)<br />
<br />
So, you see; it is possible for a student who is bright - Natalia is bright, intelligent, conscientious n never over-ride me on my implementation of the tuition programme - and has zero knowledge of physics initially to eventually score A* in IGCSE by spending 2 hours/week (for about 15 months) taking tuition from a physics tutor with proven record.<br />
<br />
Proven record means the tutor must have produced many verifiable tuition students who scored A* or A in the subject before and he must have a systematic approach in conducting his tuition - covering every areas mentioned in the applicable syllabus using: firstly, an Examiner-approved (Cambridge) textbook n all the questions therein; secondly, has taken pain in extracting relevant past year questions for the student to do upon finishing each syllabus area or topic; and, finally, just 2 or 3 months before exams, going through all the preceding 3 or 4 years of past-year questions on paper-by-paper basis (not topic-by-topic as was earlier done)..<br />
<br />
Natalia's mom has experience in giving tuition too. She sat in during the first few lessons. She was impressed and she paid me RM100 /hr (instead of the my normal RM90 /hr for IGCSE level) because she knew from her experience that I have spent a lot of time n effort in preparing my tuition programme including in extracting topical questions for my students.<br />
<br />
Natalia's A* would not have been possible without her Mom concurrent monitoring of homework (mainly past-year questions) I gave Nat to do.<br />
<br />
So, it's joint-happiness for Natalia's A*.<br />
<br />
Heartiest congrats to Natalia and I'm really proud of you Nat! :) <3<br />
<br />
<br />
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MR. Tan (tutortan1@gmail.com)http://www.blogger.com/profile/14597183604923036693noreply@blogger.com0tag:blogger.com,1999:blog-8073878804223260414.post-30744797560737147842018-08-15T07:06:00.002+08:002018-08-15T07:06:26.986+08:00Nicole Gan Scored A (88%) For Her CIE Chemistry AS 9701 In May/ June 2018 Exams<div dir="ltr" style="text-align: left;" trbidi="on">
Yeah, good news! My CIE (A-level) Chemistry AS tuition student Ms. Nicole scored
A (88%) - as per her text this afternoon.<br />
<br />
Chemistry was the only A-level
science subject she sought my help n it's an A :)<br />
<br />
In IGCSE (O-level) previously she sought my help on 3 subjects n she scored:<br /> * Chemistry 0620: A* (94%)<br /> * Physics 0625: A* (93%)<span class="text_exposed_show"><br /> * Add-Maths 0606 A (83%)</span><br />
<span class="_ezo" id="u_ps_jsonp_3_5_1" style="color: #f1765e; font-weight: 600;"> </span><br />
<span class="_ezo" id="u_ps_jsonp_3_5_1" style="color: #f1765e; font-weight: 600;">Congrats</span>! Happy for her <span class="_47e3 _5mfr" title="smile emoticon"><img alt="" class="img" height="16" role="presentation" src="https://static.xx.fbcdn.net/images/emoji.php/v9/f4c/1/16/1f642.png" width="16" /></span></div>
MR. Tan (tutortan1@gmail.com)http://www.blogger.com/profile/14597183604923036693noreply@blogger.com0tag:blogger.com,1999:blog-8073878804223260414.post-45231780143542404042018-01-22T21:13:00.001+08:002019-12-05T22:17:25.717+08:00Matthew Sia Scored A for IGCSE Chemistry 0620 in Oct /Nov 2017 Exams<div dir="ltr" style="text-align: left;" trbidi="on">
Results for IGCSE Oct /Nov 2017 exams were released a few days ago.<br />
<br />
Very happy to receive a texted message from mum of Matthew Sia (Beacon House) who scored A in IGCSE Chemistry 0620 - the only subject he took tuition from me. If he also took physics and add-maths from me, I'm confident it will be at least 3 A's.<br />
<br />
Matthew started his first chemistry tuition class with me on 18th July 2016 at 5.30pm in BU7. Like most students, he was weak in the beginning. But every step of the way, he followed my tuition plan for him without any interruption or disobedience - such as by giving excuses that couldn't do the homework I emailed to him on time because of this and that (printer no ink, sch tests for other subjects, Grade 6 piano test, etc. coming up - as was regularly given by one Tenby's student in USJ).<br />
<br />
I coached him - using the same approach that I used with other students who did well - based closely on every specification in the IGCSE Chemistry 0620 syllabus and relevant past-year n textbook questions. And, he diligently followed my programme - his results again confirm the method was the correct n effective method! Those who liked to super-impose their own programme on mine so far never did well. There was a student who suddenly decided to do summary of the textbook and the formulae therein for my marking instead of focusing on the syllabus specification n the past year questions that I wanted her to complete in time - much to my bewilderment n surprise! Once I conclude that it's a situation or behaviour that I can't change, I have a thousand n one way to say 'bye2' or to make them say 'goodbye' to me - it has happened! So, remember: if you want to do or learn something with me, give me your 100%, or, it's "bye2" from me to you or from you to me in due course. Only if you seriously want to do well, then take tuition from me. Otherwise, get lost - I really have no time nor patience for nonsense!<br />
<br />
Coming back: Another aspect I remember fondly of my tuition experience with Matthew was: his mum's more than punctual payments of tuition fees - never ever been late and always a few days in advance before the first lesson of the month. From my point of view, this is respect n satisfaction for my tuition service! When appreciated, human reciprocated accordingly -seeing the results is believing! Agree? :) Respect is another red-line that must not be repeatedly crossed!<br />
<br />
On the results day, his mum's texted message reads: "... got an A for chem. Thank you so much for your help. Thumb up, thumb up." Very nice lady - thanks for treating me well, madam! Yeah, another successful assignment!<br />
<br />
My heartiest congratulation to Matthew Sia of Beacon House!<br />
<br />
P/s:<br />
<br />
Currently, 3 of my tuition students who did very well in their IGCSE - meaning getting A* (>90%) or near to A* (88%) - are taking A-level tuition in chemistry from me - one each doing IBDP, Edexcel and CIE. Believe, I'll have good A-level results news to gloat about in due course. Just kidding - actually a lot of serious n organized work in the meantime. Excellence is the objective right from Day 1. :) We can make it!</div>
MR. Tan (tutortan1@gmail.com)http://www.blogger.com/profile/14597183604923036693noreply@blogger.com0tag:blogger.com,1999:blog-8073878804223260414.post-58310182532758732072017-08-25T09:38:00.000+08:002019-12-16T14:24:09.965+08:00Caroline W. McLean Scored A* for Both Chemistry (4CHO) n Physics (4PHO) in 2017 Edexcel Int'l GCSE May /June Exams<div dir="ltr" style="text-align: left;" trbidi="on">
Yesterday (24.08.2017, Thurs) at 1020 pm:<br />
<br />
Caroline W. McLean (Alice Smith Int'l Sch) texted happy news to inform that in the recent 2017 Edexcel Int'l GCSE May /June exams, she: "... passed Chemistry and Physics with 2 A*'s ...". She used the humble word "passed" when in fact it was "excelled" in the 2 subjects with A* - that's typical of interesting Caroline!<br />
<br />
Caroline took tuition from me in 3 Edexcel O-level subjects: Chemistry (4CHO), Physics (4PHO) and Math (4MAO). She started with Chemistry - then she requested tuition too for Physics n Math nearer to her formal exams.<br />
<br />
My heartiest congratulations to this gymnast-looking sweet girl, Caroline W. McLean!<br />
<br />
Nice of you indeed to inform me of your results!<br />
<br />
Best wishes for your next phase, Caroline! :)<br />
<br />
Sincerely,<br />
Douglas Tan<br />
<br />
<b>WhatsApp No.: 011 2120 1608 </b><br />
<br /></div>
MR. Tan (tutortan1@gmail.com)http://www.blogger.com/profile/14597183604923036693noreply@blogger.com0tag:blogger.com,1999:blog-8073878804223260414.post-40956403859394064262017-08-13T23:11:00.000+08:002019-12-05T22:23:23.627+08:00Nazeera Shafleena (Sri Cempaka) Scored A's for Both Chemistry and Physics in 2017 IGCSE May/June Exams<div dir="ltr" style="text-align: left;" trbidi="on">
On 10 Aug 2017, it was the Results Day for 2017 IGCSE May/June Exams.<br />
<br />
At 3.33 pm that day, Nazeera Shafleena (of Sri Cempaka) texted me the good news: She scored A's for both IGCSE Chemistry 0620 and Physics 0625 - the 2 subjects she took tuition from me since Jan 11th 2017. Nazeera also whatsapped me her results slip n a long 'thank you' note.<br />
<br />
Fantastic really!<br />
<br />
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<br />
<br />
Sincerely,<br />
Douglas</div>
MR. Tan (tutortan1@gmail.com)http://www.blogger.com/profile/14597183604923036693noreply@blogger.com0tag:blogger.com,1999:blog-8073878804223260414.post-58354198030164118642017-06-18T23:19:00.003+08:002018-01-07T22:16:48.719+08:00Vacant Tuition Slots Up For Grab<div dir="ltr" style="text-align: left;" trbidi="on">
<br />
<b>(13/08/2017): The post below are no longer valid - all slots filled. If you really need a slot, just try!</b> <br />
<br />
Hello,<br />
<br />
Summer May/June 2017 IGCSE O-level and Edexcel O-level exams were just over. As
such, some tuition slots are available for grabs on
'1st-come-1st-serve" (3 slots have been taken). A few more slots are available for the following subjects:<br />
<br />
* IGCSE: <b>Math 0580 </b>(Angela Loo, Absalom Wong, ... scored A's)<br />
<b>Math 0606 </b>(Nicole Gan scored A (83%), Kai Xun scored B* (79%) ...)<br />
<b> International Maths 0607</b> (Zi Zhun waiting results - Switzerland-bound)<br />
<b>Physics 0625</b> (Nicole Gan scored A* (93%), Lim Jin Quan A* (mark NA),...) <br />
<b>Chemistry 0620; </b>(Nicole Gan scored A* (94%), Lim Jin Quan A* (mark NA),...)<br />
<b><br /></b>* Edexcel: <b>Maths 4MAO / 4MBO / 4PMO</b> (Previously taught 4MBO / 4PMO at Int'l Sch)<br />
<b> Chemistry 4CHO </b>(Just tutored Ms. McLean Maths 4MAO, Chem n Physics)<br />
<b> Physics 4PHO </b>(Ms. McLean waiting for results) <br />
<br />
(CIE AS/A2: <b>Chemistry 9701 / Physics 9702</b> can be considered if approached early)<br />
<br />
Sms or whatsapp me <b>Douglas at: 011-2120 1608</b>; or,<br />
Email: <b>tutortan1@gmail.com</b><br />
<br />
Thank you.<br />
<br />
Douglas</div>
MR. Tan (tutortan1@gmail.com)http://www.blogger.com/profile/14597183604923036693noreply@blogger.com0tag:blogger.com,1999:blog-8073878804223260414.post-1977306126398800002017-01-18T00:28:00.001+08:002018-01-26T14:36:44.527+08:00Nicole Gan (Nobel Int'l Sch) Scored A* for Physics (93%) n Chemistry (94%) n A for Add-Math (83%)s in IGCSE Nov/Dec 2016 Exams<div dir="ltr" style="text-align: left;" trbidi="on">
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17.01.2017 (Mont Kiara):<br />
<br />
At about 4.28 pm today, while at Mont Kiara, received good news from Ms. Nicole Gan from Sierramas. She scored 2A* n 1A for the 3 subjects she took tuition from me, namely: IGCSE Physics 0625 (93%), Chemistry 0620 (94%) n Add-Maths 0606 (83%) respectively.<br />
<br />
Great job, Nicole!<br />
<br />
She loves ballet n has very nice posture n poise. She plays piano n was learning guitar at that time regardless of the fast-approaching exams then. And, she has a very cute younger sis who always smiled to me! :)<br />
<br />
Nicole never cancelled any class for any reason; never kept me waiting for even a minute for the class to start - very punctual. The book that I lent to her she duly returned on completion of her last lesson. This girl has many positive qualities.<br />
<br />
My heartiest congrats to Nicole n best wishes for your next phase in life!<br />
<br />
Cheers!<br />
<br />
Douglas.<br />
<br />
WhatsApp No.: 011-2120 1608 </div>
MR. Tan (tutortan1@gmail.com)http://www.blogger.com/profile/14597183604923036693noreply@blogger.com0tag:blogger.com,1999:blog-8073878804223260414.post-24350812877393606102016-09-04T12:11:00.000+08:002017-06-18T22:36:22.697+08:00Karina and Danial left for UK last night - Goodbye n Best Wishes!<div dir="ltr" style="text-align: left;" trbidi="on">
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Last night, Karina flew back to London (B.... Royal Boarding Sch) after was back here for about a month's for her yr-end break.</div>
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We met 10 x 2 hrs over her A-level AQA chemistry.</div>
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She'll be back in Oct for d 6th or 7th times in slightly over a yr because MAS has promotions for KL-London flights...</div>
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I gave tuition to Karina in IGCSE Physics 0625 n Chemistry 0620 from her yr 10 in Gdn Int'l Sch (Mont Kiara) and she scored A's for both subjects (plus other subjects too) before going over to the London Boarding School. </div>
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<span style="line-height: 19.32px;">Best wishes to Karina!</span></div>
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Danial too flew to Aberdeen the same night - on different flight though. <span style="line-height: 19.32px;">Danial is doing a degree there.</span></div>
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Danial was my tuition student in IGCSE Physics (since yr 10) n CIE Chemistry 9701thereafter - he never scored below B for both subjects.Thereafter, he picked up golfing and manage to win some prizes for that. Btw, Danial is brother of Karina. </div>
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<span style="line-height: 19.32px;">Best wishes to Dan too!</span></div>
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MR. Tan (tutortan1@gmail.com)http://www.blogger.com/profile/14597183604923036693noreply@blogger.com0tag:blogger.com,1999:blog-8073878804223260414.post-7788997329278288612016-08-11T22:38:00.001+08:002019-12-05T22:25:06.860+08:00Lim Jin Quan (Sri Cempaka) Scored A* for both Physics 0625 n Chemistry 0620 in May/June 2016 Exams!<div dir="ltr" style="text-align: left;" trbidi="on">
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg1DrVrf716PUKrZXHBXSUmKxP49q9VT8kk0ae-yPHVDaLVwaxQ3I3-ZYPXsOnbwqDwcwE45aBT_2_UhfHcsxe1Ksxrg5YTfE8ggTqO6H8RuIcViHDMGpYMeZKJObH9jsk7oL9yL9gVt7li/s1600/IMG_0805.PNG" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="960" data-original-width="640" height="320" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg1DrVrf716PUKrZXHBXSUmKxP49q9VT8kk0ae-yPHVDaLVwaxQ3I3-ZYPXsOnbwqDwcwE45aBT_2_UhfHcsxe1Ksxrg5YTfE8ggTqO6H8RuIcViHDMGpYMeZKJObH9jsk7oL9yL9gVt7li/s320/IMG_0805.PNG" width="213" /></a></div>
This is great!<br />
<br />
Jin Quan whatsapped a moment ago that he scored A-Star (A*) in the two subjects he took tuition from me since Dec 2015 (at RM90/hr/subject) - Physics 0625 and Chemistry 0620.<br />
<br />
What better way to record my "heartiest congrats" and appreciation to Jin Quan than to do it through a dedicated post!<br />
<br />
Jin Quan was a conscientious, diligent and good student with very caring Mom and Dad and a cute little sister. Tuition was held at either Publika or Valencia.<br />
<br />
When he came to me, he wasn't sure if he could score A's for both subjects: school marks were around 60-70% - Physics was slightly better than Chemistry. So he took more hours per week of tuition for Chemistry than Physics.<br />
<br />
After a few lessons with him, I never have any doubt that I could assist him to score at least A's for both. <br />
<br />
And, the eventual results: A* for both! Really happy for him!<br />
<br />
Best wishes, Jin Quan!<br />
<br />
Sincerely,<br />
Douglas<br />
<br />
P/s:<br />
<br />
Warm regards n heartiest congrats to your Mom n Dad too! :) </div>
MR. Tan (tutortan1@gmail.com)http://www.blogger.com/profile/14597183604923036693noreply@blogger.com0tag:blogger.com,1999:blog-8073878804223260414.post-31475869673220576262014-03-20T11:30:00.001+08:002018-01-26T14:56:12.417+08:00SPM 2013 Results Out Today (20/03/2014, Thurs)<div dir="ltr" style="text-align: left;" trbidi="on">
470,395 students sat for SPM 2013 last year.<br />
<br />
11,892 scored FULL A's --- 244 more than SPM 2012<br />
<br />
405 scores ALL A+s --- of which 366 were from national schools (sekolah kebangsaan).<br />
<br />
This is the best results in 5 years. For press report, read <a href="http://www.nst.com.my/latest/font-color-red-spm-results-font-11-892-students-score-grade-a-1.522654">here</a>.<br />
<br />
<u><b>Personal notes</b>:</u><br />
<br />
<b>My dearest disciple</b> scored ALL A's but B+ for the controversial "Moral" paper: It's <b>8As and 1B+ </b>for Mei. Congrats on the 8As and sympathy for the B+ . In PMR, she scored FULL A's!<br />
<br />
(18.4.2014) Another student - also from Mei's school - who took Physics and Chemistry tuition from me a few months before SPM scored <b>A's for both subjects.</b> In fact, he scored FULL 9A's!! Congrats to Manoj! Come to think of it, the number of my tuition students who scored full A's in SPM and IGCSE exams are fast becoming uncountable...really wonderful! (Manoj has left a comment below - click 'comment' to read more!)<br />
<br />
Mei and about 20 to 30 others (including Manoj) received their "Anugerah Cermelang Academik 2014 SPM" (SPM 2014 Academic Excellence Award) for scoring 8A's and above at their school this morning.<br />
<br />
Mei was also the President of her school's Netball Club; Secretary of 1 of the 4 sport houses; represented school at some levels of netball competition - all these kept her quite busy actually...but it sharpens her multi-tasking skill too...<br />
<br />
30.6.2014: Today Manoj posted a comment (please click "comment" below) to happily say that he actually scored <b>A+</b> <b>for both</b> the subjects he took tuition from me i.e. <b>Physics and Chemistry </b>(not just A's)! Absolutely wonderful! Do send my regards to your parents - not forgetting your Mom's Deepavali's cookies - truly delicious! Thks Ma'am!!<br />
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<b style="background-color: white; color: #333333; font-family: Arial, Tahoma, Helvetica, FreeSans, sans-serif; font-size: 14.85px; line-height: 20.79px;"><u>Need Help In Physics, Chemistry and Maths in or around Petaling Jaya?</u></b><br />
<b style="background-color: white; color: #333333; font-family: Arial, Tahoma, Helvetica, FreeSans, sans-serif; font-size: 14.85px; line-height: 20.79px;"><u><br /></u></b><span style="background-color: white; color: #333333; font-family: "arial" , "tahoma" , "helvetica" , "freesans" , sans-serif; font-size: 14.85px; line-height: 20.79px;"></span><b style="background-color: white; color: #333333; font-family: Arial, Tahoma, Helvetica, FreeSans, sans-serif; font-size: 14.85px; line-height: 20.79px;"><u>Good News: Vacant tuition slots are now up for grab!</u></b><br />
<br style="background-color: white; color: #333333; font-family: Arial, Tahoma, Helvetica, FreeSans, sans-serif; font-size: 14.85px; line-height: 20.79px;" />
(June 18th, 2017):<br />
<br />
Hello,<br />
<br />
Summer May/June 2017 IGCSE O-level and Edexcel O-level exams were just over. As
such, some tuition slots are available for grabs on
'1st-come-1st-serve" (3 slots have been taken). A few more slots are available for the following subjects:<br />
<br />
* IGCSE: <b>Math 0580 </b>(Angela Loo, Absalom Wong, ... scored A's)<br />
<b>Math 0606 </b>(Nicole Gan scored A (83%), Kai Xun scored B* (79%) ...)<br />
<b> International Maths 0607</b> (Switzerland-bound Zi Zhun scored B)<br />
<b>Physics 0625</b> (Nicole Gan scored A* (93%), Lim Jin Quan A* (mark NA),...) <br />
<b>Chemistry 0620; </b>(Nicole Gan scored A* (94%), Lim Jin Quan A* (mark NA),...)<br />
<b><br /></b>* Edexcel: <b>Maths 4MAO / 4MBO / 4PMO</b> (Previously taught 4MBO / 4PMO at Int'l Sch)<br />
<b> Chemistry 4CHO </b>(Ms. McLean scored A*)<br />
<b> Physics 4PHO </b>(Ms. McLean scored A*) <br />
<br />
(CIE AS/A2: <b>Chemistry 9701 / Physics 9702</b> can be considered if approached early)<br />
<br />
Sms or whatsapp me <b>Douglas at: 011-2120 1608</b>; or,<br />
Email: <b>tutortan1@gmail.com</b><br />
<br />
Thank you.<br />
<br />
Douglas<br />
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<span style="background-color: white; color: #333333; font-family: "arial" , "tahoma" , "helvetica" , "freesans" , sans-serif; font-size: 14.85px; line-height: 20.79px;">(May 30th, 2016): Summer May/June 2016 IGCSE O-level and CIE AS/A2 exams are ending. As such, some tuition slots are available for grabs on '1st-come-1st-serve". The tuition slots are for:</span><br />
<br style="background-color: white; color: #333333; font-family: Arial, Tahoma, Helvetica, FreeSans, sans-serif; font-size: 14.85px; line-height: 20.79px;" />
<span style="background-color: white; color: #333333; font-family: "arial" , "tahoma" , "helvetica" , "freesans" , sans-serif; font-size: 14.85px; line-height: 20.79px;">* IGCSE: </span><b style="background-color: white; color: #333333; font-family: Arial, Tahoma, Helvetica, FreeSans, sans-serif; font-size: 14.85px; line-height: 20.79px;">Math 0580</b><br />
<span style="background-color: white; color: #333333; font-family: "arial" , "tahoma" , "helvetica" , "freesans" , sans-serif; font-size: 14.85px; line-height: 20.79px;"> </span><b style="background-color: white; color: #333333; font-family: Arial, Tahoma, Helvetica, FreeSans, sans-serif; font-size: 14.85px; line-height: 20.79px;">Math 0606</b><br />
<span style="background-color: white; color: #333333; font-family: "arial" , "tahoma" , "helvetica" , "freesans" , sans-serif; font-size: 14.85px; line-height: 20.79px;"> </span><b style="background-color: white; color: #333333; font-family: Arial, Tahoma, Helvetica, FreeSans, sans-serif; font-size: 14.85px; line-height: 20.79px;">Physics 0625</b><br />
<span style="background-color: white; color: #333333; font-family: "arial" , "tahoma" , "helvetica" , "freesans" , sans-serif; font-size: 14.85px; line-height: 20.79px;"> </span><b style="background-color: white; color: #333333; font-family: Arial, Tahoma, Helvetica, FreeSans, sans-serif; font-size: 14.85px; line-height: 20.79px;">Chemistry 0620</b><br />
<b style="background-color: white; color: #333333; font-family: Arial, Tahoma, Helvetica, FreeSans, sans-serif; font-size: 14.85px; line-height: 20.79px;"><br /></b><span style="background-color: white; color: #333333; font-family: "arial" , "tahoma" , "helvetica" , "freesans" , sans-serif; font-size: 14.85px; line-height: 20.79px;">(Edexcel Maths and Physics; SPM Maths, Physics and Chemistry can be considered.</span><br />
<br style="background-color: white; color: #333333; font-family: Arial, Tahoma, Helvetica, FreeSans, sans-serif; font-size: 14.85px; line-height: 20.79px;" />
<span style="background-color: white; color: #333333; font-family: "arial" , "tahoma" , "helvetica" , "freesans" , sans-serif; font-size: 14.85px; line-height: 20.79px;">* CIE AS/A2: </span><b style="background-color: white; color: #333333; font-family: Arial, Tahoma, Helvetica, FreeSans, sans-serif; font-size: 14.85px; line-height: 20.79px;">Chemistry 9701</b><br />
<br style="background-color: white; color: #333333; font-family: Arial, Tahoma, Helvetica, FreeSans, sans-serif; font-size: 14.85px; line-height: 20.79px;" />
<span style="background-color: white; color: #333333; font-family: "arial" , "tahoma" , "helvetica" , "freesans" , sans-serif; font-size: 14.85px; line-height: 20.79px;">WhatsApp me </span><b style="background-color: white; color: #333333; font-family: Arial, Tahoma, Helvetica, FreeSans, sans-serif; font-size: 14.85px; line-height: 20.79px;">Douglas at: 01<span style="font-family: "arial" , "tahoma" , "helvetica" , "freesans" , sans-serif;">1-2120 <span style="font-family: "arial" , "tahoma" , "helvetica" , "freesans" , sans-serif;">1608</span></span></b><span style="background-color: white; color: #333333; font-family: "arial" , "tahoma" , "helvetica" , "freesans" , sans-serif; font-size: 14.85px; line-height: 20.79px;"> or, </span><br />
<span style="background-color: white; color: #333333; font-family: "arial" , "tahoma" , "helvetica" , "freesans" , sans-serif; font-size: 14.85px; line-height: 20.79px;">email: </span><b style="background-color: white; color: #333333; font-family: Arial, Tahoma, Helvetica, FreeSans, sans-serif; font-size: 14.85px; line-height: 20.79px;">tutortan1@gmail.com</b><br />
<b style="background-color: white; color: #333333; font-family: Arial, Tahoma, Helvetica, FreeSans, sans-serif; font-size: 14.85px; line-height: 20.79px;"><br /></b><span style="background-color: white; color: #333333; font-family: "arial" , "tahoma" , "helvetica" , "freesans" , sans-serif; font-size: 14.85px; line-height: 20.79px;"></span><span style="background-color: white; color: #333333; font-family: "arial" , "tahoma" , "helvetica" , "freesans" , sans-serif; font-size: 14.85px; line-height: 20.79px;">Thank you.</span></div>
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MR. Tan (tutortan1@gmail.com)http://www.blogger.com/profile/14597183604923036693noreply@blogger.com1tag:blogger.com,1999:blog-8073878804223260414.post-69134892878887309202014-01-24T18:51:00.000+08:002018-01-07T22:22:02.504+08:002013 Oct/Nov IGCSE Cambridge (Physics 0625) Results Are Out Today!<div dir="ltr" style="text-align: left;" trbidi="on">
<u>24.1.2014</u>: <b>Alistair Yong</b> called an hour ago to convey gratitude and good news: he <b>obtained A (85 marks)</b> for his <b>IGCSE Cambridge Physics 0625</b> (Oct/Nov 2013 exams). His Mum sms too. His Mum was happy so was I. Alistair is a bright kid who has been consistent and diligent in his study...Even on the eve of his Paper 1, we spent an hour or so at TTDI Starbucks reinforcing him...the 1-to-1 hours together paid off...It's a great news for my birthday tomorrow... :)<br />
<br />
<b>Danial</b> who took over Alistair's mobile informed that his score is slightly below Alistair's (he told me the details). Danial might be asking for re-marking. And, I support that because from July 2012 until his recent exams, his scores for all the exercises I gave have been consistently higher than his current score...Let's see the final outcome.<br />
<br />
More results are pouring in ... <b><a href="https://www.facebook.com/Absalom95/videos/vob.100002350322762/166518103436533/?type=2&theater">Absalom W</a>.</b> who did his <b>IGCSE Cambridge Maths 0580</b> with me - meaning, I tutored him - told me that he hasn't obtained his results yet - he is from different international school. All indications are: he would do well: Fyi, he was and I think still is the <b>10th fastest in Malaysia</b> for the "<b>Rubick Cube</b>" challenge. At Starbucks, he did it under 30 seconds (the Rubick Cube was personally 'messed-up' by me)...haha...I think to impress either cute Angela or Ayiesha rather than me, right? Well, why not? For the 10th position he did it in 20 seconds...<br />
<br />
We studied hard and we also have fun together - interesting and memorable times. <b>Absalom</b> also holds a diploma in piano and <a href="https://www.facebook.com/Absalom95/videos/vob.100002350322762/166518103436533/?type=2&theater">teaches piano</a> during free time...<br />
<br />
Next, may be I should write about <b>Angela Loo</b> (Absalom's classmate) ....stay connected for more...<br />
<br />
<u>25.1.2014 (12.35 pm)</u>:<br />
1) <b>Angela Loo -</b> my student for <b>IGCSE Cambridge Physics 0625 </b>and <b>IGCSE Cambridge O-Maths 0580 - </b>called to share the good news: She obtained <b>A+ for Physics</b> and <b>A for her O-Maths. </b>Fantastic! My heartiest congrats!! I also learnt that she was the top student - scoring straight/full As: 4 A+ and 2 As - her HM actually posted a congrats note in her international school's blog.<br />
<br />
2) Birthday wishes in cutest wordings from a former student: <span style="color: cyan;"><u style="font-weight: bold;">here</u> </span>(doesn't show - plug-in needed)<br />
<br />
<u>26.1.2014</u>:<br />
10:46pm - received this sms from <b>Absalom </b>(my 2013 <b>IGCSE Cambridge O-Maths 0580 </b><b>student</b>)<b> </b>: "Mr. Douglas! I failed you! :( I got only an <b>A</b>." (See, scoring an A means failing me - that's the kind of attitude we want our students to have!! The target was A+)<br />
<br />
10:57pm - replied to him: "Hey, don't be upset - you probably miss by a whisker juz like... - may be not careful in your working - still a great improvement from d day I first (met) u - ..., Congrats!!! ...Gdnite :)"<br />
<br />
11:01pm - Absalom replied: "Hahaha! Sure! :)) (big grin) Thanks for everything! I hope you"ll never forget me! Because I will never forget a great teacher (sic: tutor) like you! Good nights."<br />
<br />
<u>7.2.2014</u> - Found out yesterday from Zach and Brandon (Angela's juniors) during their IGCSE Cambridge Maths 0580 lesson with me: that Angela not only scored A+ and A for my physics (0625) and O-maths (0580) respectively but also A+s and As for all other subjects she took - Happy go lucky Angela was the top student with 4A+s and 2As. Starbucks meal on me when we meet!!! By the way, she was the only one who won a Starbucks drink from me for successfully solving a physics challenge-question thrown at her group of 5 - that was an early sign of good things to come. I'm really happy for you, Angela!<br />
<br />
<u>26.4.2014</u><br />
Today is the day US President Obama visited Malaysia. Air Force One touched down at Subang RMAF air base at 4.50 pm and so it was reported. Welcome to Malaysia, Mr. President! The people in this region surely have not forgotten the sacrifice and the constructive role the Americans played during World War II to end the war! Life and history would have been very different if not because of the Americans. So, a warm welcome to US President Obama!<br />
<br />
On this historic day, at around 6 pm, Angela, Absalom and I were catching up at TTDI Starbucks.<br />
<br />
Angela who scored FULL A's - 4 A+ (incl my physics) and 2 A's (incl. my O-maths) - may be leaving to US to further her study soon - can be as early as Sept; I may be spending some time with her over maths (trigo) and chemistry (organic compounds, etc) in the next few weeks.<br />
<br />
Absalom looked fitter, now doing double degrees - music (piano) and vocal; and will be competing at ASEAN level music competitions held in Singapore and Thailand soon. He promises to give his best shot and if emerges winners, will email video of his performance for display in this blog.<br />
<br />
I encouraged both to be passionate in what they are pursuing: Go all out and leave their marks on world stage! The two are potential world-beaters. Give them a bit of time - I'm sure they have a lot to offer wherever they go!<br />
<br />
It was a nice Sat evening...and, I hope they both liked their Starbucks meals (Fusilli chicken, beef lasagna, green tea latte, caramel crm frappucino...)<br />
<br />
Best wishes, folks!<br />
-----------------------------------<br />
<br />
29.04.14<br />
<br />
Danial's sis (Karina, IGCSE Year 10) will be joining me for physics commencing this coming Sat...Karina is from Garden Int'l School. She gave me the impression of being sharp and a quick learner in our first meeting. Expect her to do very well. Btw, she's very good-looking too :)<br />
<br />
(<b>Notes</b>:<br />
<b><i>* Karina sat for IGCSE May </i></b><b><i>/June 2015 exams. When the results were announced on 11th Aug 2015, true to my expectation, she scored A's for physics and chemistry - the 2 subjects she took tuition from me. In fact, she scored 7As and 2Bs. </i></b><br />
<b><i><br /></i></b>
<b><i>* On 1st Sept 2015, she (and her family) flew to UK for her to attend a boarding school there. In the morning, I sent her my "Best Wishes". Great! </i></b><br />
<b><i><br /></i></b>
<b><i>* On 26th Oct 2015 (Mon), she was back for 2-week 1st-semester break. We went through Chemistry the next day and 4 other days and she flew back to UK on Nov 7th (Sat). Best wishes, Karina!</i></b><br />
<br />
* <b><i>On 18th Dec 2015 (Fri), Karina was back for 2-week end-of-semester break. On 21st Dec (Mon), went thru AQA chemistry with her; will do so for six 2-hr lessons with her before she goes back to UK on 3rd. Jan 2016.</i></b>)<br />
<br />
27.6.2014 (Fri)<br />
<br />
Received a nice sms from <a href="https://www.facebook.com/imeltfaceswithmyguitarsolos/videos/vb.1444354069198941/1451417185159296/?type=2&theater">Zach</a> - a former tuition student who just sat for his 'Summer IGCSE Cambridge Exams'. Zach (a Singaporean) expressed gratitude for teaching him maths and asked if I have time slots for his 2 friends who will be sitting for the coming winter exams (Oct/Nov). Told him K. Xun's Monday slot had been taken up by a Korean student but Friday is available.<br />
<br />
28.6.2014: The next day, his friends Sarah (and Shannon Khoo) followed up: After some exchanges, they decided to take up a 2-hr lesson on Fri and another 2-hr lesson on Sunday. Will keep my Saturday free. As always, I will do my best for them.<br />
<br />
29.6.2014: <a href="https://www.facebook.com/imeltfaceswithmyguitarsolos/videos/vb.1444354069198941/1451417185159296/?type=2&theater">Zach is very much into muzic and guitar</a> and was very happy with his progress in maths during his months with me. Even his classmates like Kai Xun (who paid RM3200/mth) noticed his tremendous progress (Note: Zach sms his results on 12/08/2014 night - full transcript of his sms below). That's really wonderful because what we coached worked! Zach's sms mentioned that there might be more of his friends joining...When time slots are limited, may be those with attitude problems (homework given not done, email instructions not read, low on PR skills, etc...) will be dropped to make way...Folks, buck up before it's too late because this Sir may be kind but never indecisive...Get it?!.<br />
<br />
Looking forward to my 1st lesson with Sarah and Shannon...<br />
<br />
11.7.2014: Today was supposed to be the 1st lesson with Shannon and Sarah. However, due to the semester break, Shannon's family decided to go to Penang for a few days of family outing. Hence, 1st lesson rescheduled to 18.7.2014...this was a blessing in disguise, it gave me slightly more time to complete my preparation for them: compiling the relevant past-year questions into the 37 syllabus areas. Preparation completed in time!<br />
<br />
18.7.2014 (Fri): 1st lesson with Sarah and Shannon - both gave me very good impression: Diligent, have complete support facilities at home (functional printers, computer with relevant soft-wares all available), can be contacted by hand-phones all the times. Good people-relation skills. Both are good-looking. Shannon goes for advanced ballet classes 4 times a week. Sarah's maternal side is VIP.<br />
<br />
1.8.2014 (Fri): Shannon and Sarah decided to increase the lessons from 2x a week to 3x a week - 2 hours each. To allow that to happen, some adjustments and rescheduling may have to be made.<br />
<br />
<b><u>2014 May/June Results Are Out Today!</u></b><br />
<b><u><br /></u></b>
12.8.2014 (Tues) Night, 10.38 pm: Zach sms: "Sorry to bother you this late Mr. Douglas, I just got my maths results today and I scored 79 (B)...I just want to thank you for helping me achieve that from E :) " This is really wonderful. I am expecting more good news...Stay connected to this post...<br />
<br />
13.8.2014 (Wed) Night, 8.08 pm: K. Xun sms: "...I got my Physics and Add Maths results. Both also B...I can't imagine it...They were so surprised...Thanks for teaching me. If not, don't even think I could pass..." K. Xun came to me (through Zach's recommendation) when everyone has given up hope on him. He related to me some hurtful remarks made to him in his class. My initial assessment was: He's a bright kid with very good learning attitude - very keen to learn. I knew he could be 'rescued'. So I took it as a challenge and did the best that I could for him, particularly when the parents are such a good pay-master - always paid punctually on the 1st lesson of every month (RM3200/mth). From single-digit marks (6 or 7 marks), he now obtains B for both Physics and Add Maths! His parents are happy, so am I!. Never give up on yourself even when others have given up on you!! Best wishes, K. Xun! <br />
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<b><u>A Special Day to Remember!</u></b><br />
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<b>22.8.2014 (Fri)</b>: 3 years ago, on this day in the evening, my Mum passed away at the age of 83. Mum is a great lady - very patient, kind and loving. Imagine in those days without washing machine, she would hand-wash all our clothing - 10 kids (incl. me). Hand-wash your own clothes and you will know what she must have gone through - not just for 1 day but all the years that we grew up! A great sacrifice that will never be forgotten...forever!<br />
<br />
Whenever we returned to visit her, she would never fail to cook the dish that we individually liked!<br />
<br />
Really regret that couldn't visit her with my kids as often as I should in her sunset years. She has many grand daughters and 3 grandsons of whom 2 grandsons (including 1st grandson) and 1 granddaughter were 'contributed' by me. Among her grown granddaughters are: an Auckland-trained doctor (now in Melbourne) and a lawyer (now working for a world-class international law firm with regional HQ in S'pore) - soon, there will be a dentist, another doctor, more lawyers and ...<br />
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Mum is very thrifty by nature: in her sunset years, although kids can afford to let her have regular hairdos, she would rather keep her simple and humble look so that the kids need not spend on her! If you ever see an old lady with a simple and humble look in the street, don't look down on her: because this old lady may just be thrifty...for her kids.<br />
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Went to a religious place to spend some time (about 30 minutes) praying for Mum and her soul. I also asked for forgiveness for failure to visit her as often as I should in her sunset years with my kids. That I regret forever... May my Mum rest in peace...On 31/3/2014 (during the Cheng Ming festival), I and my kids visited Mum's grave in Ipoh with flowers...We'll miss Mum forever...Whenever we drop by Ipoh, we would and will visit her grave...(On 16/11/2014, after spending 4-day break at Pangkor (please see below), on the way back to Klang Valley, decided to drive north to visit Mum's grave - we brought along flowers which we think Mum likes and spent some time at Mum's grave before heading back)<br />
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<u style="font-weight: bold;">12.11.2014 (Wed):</u><br />
<br />
In the morning: Spent an hour or so with Shannon on IGCSE Chemistry 0620. Shannon will be sitting for Chem Papers 13 and 33 and a Biz paper as well tomorrow. Thereafter, it's a well-deserved 1.5 months break-cum-holidays for her. Happy Holidays, Shannon. By the way, you looked real great after horse-riding the other morning! Have fun!!<br />
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In the afternoon, have 2 hours of Add-Maths with my Korean student Ms Kim SH @ S. Recipe Plaza Mont Kiara. She would be visiting Universal Studio Singapore this weekend...<br />
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Karina of Gdn International School was away in UK for an entrance exams since the beginning of this month. Should be back any time now. Hope she did well. On 22nd, we will resume our physics lessons...<br />
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<b style="background-color: white; color: #333333; font-family: Arial, Tahoma, Helvetica, FreeSans, sans-serif; font-size: 14.85px; line-height: 20.79px;"><u>Need Help In Physics, Chemistry and Maths in or around Petaling Jaya?</u></b><br />
<b style="background-color: white; color: #333333; font-family: Arial, Tahoma, Helvetica, FreeSans, sans-serif; font-size: 14.85px; line-height: 20.79px;"><u><br /></u></b><span style="background-color: white; color: #333333; font-family: "arial" , "tahoma" , "helvetica" , "freesans" , sans-serif; font-size: 14.85px; line-height: 20.79px;"></span><b style="background-color: white; color: #333333; font-family: Arial, Tahoma, Helvetica, FreeSans, sans-serif; font-size: 14.85px; line-height: 20.79px;"><u>Good News: Vacant tuition slots are now up for grab!</u></b><br />
<br style="background-color: white; color: #333333; font-family: Arial, Tahoma, Helvetica, FreeSans, sans-serif; font-size: 14.85px; line-height: 20.79px;" />
(June 18th, 2017):<br />
<br />
Hello,<br />
<br />
Summer May/June 2017 IGCSE O-level and Edexcel O-level exams were just over. As
such, some tuition slots are available for grabs on
'1st-come-1st-serve" (3 slots have been taken). A few more slots are available for the following subjects:<br />
<br />
* IGCSE: <b>Math 0580 </b>(Angela Loo, Absalom Wong, ... scored A's)<br />
<b>Math 0606 </b>(Nicole Gan scored A (83%), Kai Xun scored B* (79%) ...)<br />
<b> International Maths 0607</b> (Zi Zhun waiting results - Switzerland-bound)<br />
<b>Physics 0625</b> (Nicole Gan scored A* (93%), Lim Jin Quan A* (mark NA),...) <br />
<b>Chemistry 0620; </b>(Nicole Gan scored A* (94%), Lim Jin Quan A* (mark NA),...)<br />
<b><br /></b>* Edexcel: <b>Maths 4MAO / 4MBO / 4PMO</b> (Previously taught 4MBO / 4PMO at Int'l Sch)<br />
<b> Chemistry 4CHO </b>(Just tutored Ms. McLean Maths 4MAO, Chem n Physics)<br />
<b> Physics 4PHO </b>(Ms. McLean waiting for results) <br />
<br />
(CIE AS/A2: <b>Chemistry 9701 / Physics 9702</b> can be considered if approached early)<br />
<br />
Sms or whatsapp me <b>Douglas at: 011-2120 1608</b>; or,<br />
Email: <b>tutortan1@gmail.com</b><br />
<br />
Thank you.<br />
<br />
Douglas<br />
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<b><u>13.11.2014 (Thurs) - 16.11.2014 (Sun)</u></b><br />
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Early in the morning, off I went to an island resort for a 4-day break. Manage to send a "Best Wishes" sms to Shannon for her Chem papers. Shannon informed around noon that the Chem papers were okay. This bright and charming girl will do well or very well. Hope for the best and Happy Holidays, Shannon. (When the results were out in Jan 2015, Shannon scored A (83) for her Chem, all her other subjects (biology, etc.) she scored As too - great girl!. Congrats!)<br />
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Nice seafood and highly-oxygenated air are the 2 things I liked most on my first day in the resort with Amanda and Alfred. We loved the seafood lunch and dinner - oyster omelet, oak-fried prawns and other prawn dishes, sliced fish with ginger and spring onion, seaweed soup, kai lan vegie with assortment of seafood and meat, ...- and of course the refreshing sea breeze...!<br />
<br />
14.11.2014 (Fri): After light western breakfasts, off we went islands hopping and snorkelling. The weather was perfect: Sea was calm, sky was overcast (so no sunburn), many international tourist were joining the fun just before we left to a pristine beach for an hour of picnic. Back to the resort by noon. When back, will certainly share photos (including beautiful sun-set and the beautiful people watching it...hehe)<br />
<br />
15.11.2014 (Sat): Both Amanda and Alfred agreed that lunch of the day was really good and worth the price...In the evening, we saw complete 'double rainbows' for the first time...really beautiful...The colours of the inside rainbow are laterally inverted from those of the outside rainbow and physics students should be able to explain that natural phenomenon...(will show photos)....to be continued...<br />
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<u><b>11.8.2015 (IGCSE May/June 2015 Results Day)</b></u>: </div>
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<b>IGCSE May/June 2015 exams results</b> are known today!, Yeah, my student <b>Karina</b> (Gdn Int'l School) scored 7As. The 7As include the 2 subjects (physics and chemistry) she took tuition from me. She had earlier on gone to UK to attend a qualifying test for admission into a boarding school there. And, on Sept 1st 2015, she flew off to UK with her Mom and Dad, to prepare for her new education phase at the <b>UK</b> - ringgit's severe depreciation is NO problem to Karina's family. Best wishes!</div>
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<b style="background-color: white; color: #333333; font-family: Arial, Tahoma, Helvetica, FreeSans, sans-serif; font-size: 14.85px; line-height: 20.79px;"><u>Need Help In Physics, Chemistry and Maths in or around Petaling Jaya?</u></b><br />
<b style="background-color: white; color: #333333; font-family: Arial, Tahoma, Helvetica, FreeSans, sans-serif; font-size: 14.85px; line-height: 20.79px;"><u><br /></u></b><span style="background-color: white; color: #333333; font-family: "arial" , "tahoma" , "helvetica" , "freesans" , sans-serif; font-size: 14.85px; line-height: 20.79px;"></span><b style="background-color: white; color: #333333; font-family: Arial, Tahoma, Helvetica, FreeSans, sans-serif; font-size: 14.85px; line-height: 20.79px;"><u>Good News: Vacant tuition slots are now up for grab!</u></b><br />
<br style="background-color: white; color: #333333; font-family: Arial, Tahoma, Helvetica, FreeSans, sans-serif; font-size: 14.85px; line-height: 20.79px;" />
<span style="background-color: white; color: #333333; font-family: "arial" , "tahoma" , "helvetica" , "freesans" , sans-serif; font-size: 14.85px; line-height: 20.79px;">(May 30th, 2016): Summer May/June 2016 IGCSE O-level and CIE AS/A2 exams are ending. As such, some tuition slots are available for grabs on '1st-come-1st-serve". The tuition slots are for:</span><br />
<br style="background-color: white; color: #333333; font-family: Arial, Tahoma, Helvetica, FreeSans, sans-serif; font-size: 14.85px; line-height: 20.79px;" />
<span style="background-color: white; color: #333333; font-family: "arial" , "tahoma" , "helvetica" , "freesans" , sans-serif; font-size: 14.85px; line-height: 20.79px;">* IGCSE: </span><b style="background-color: white; color: #333333; font-family: Arial, Tahoma, Helvetica, FreeSans, sans-serif; font-size: 14.85px; line-height: 20.79px;">Math 0580</b><br />
<span style="background-color: white; color: #333333; font-family: "arial" , "tahoma" , "helvetica" , "freesans" , sans-serif; font-size: 14.85px; line-height: 20.79px;"> </span><b style="background-color: white; color: #333333; font-family: Arial, Tahoma, Helvetica, FreeSans, sans-serif; font-size: 14.85px; line-height: 20.79px;">Math 0606</b><br />
<span style="background-color: white; color: #333333; font-family: "arial" , "tahoma" , "helvetica" , "freesans" , sans-serif; font-size: 14.85px; line-height: 20.79px;"> </span><b style="background-color: white; color: #333333; font-family: Arial, Tahoma, Helvetica, FreeSans, sans-serif; font-size: 14.85px; line-height: 20.79px;">Physics 0625</b><br />
<span style="background-color: white; color: #333333; font-family: "arial" , "tahoma" , "helvetica" , "freesans" , sans-serif; font-size: 14.85px; line-height: 20.79px;"> </span><b style="background-color: white; color: #333333; font-family: Arial, Tahoma, Helvetica, FreeSans, sans-serif; font-size: 14.85px; line-height: 20.79px;">Chemistry 0620</b><br />
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MR. Tan (tutortan1@gmail.com)http://www.blogger.com/profile/14597183604923036693noreply@blogger.com0tag:blogger.com,1999:blog-8073878804223260414.post-33785684184111905692013-11-28T17:52:00.001+08:002018-01-07T22:20:13.107+08:00SPM 2013 Physics Paper 1 Answers<div dir="ltr" style="text-align: left;" trbidi="on">
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<b><u>2013 SPM Physics Paper 1
Answers</u></b></div>
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Here are my answers - hopefully they are the same as the examiners': </div>
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<a href="http://physicsf45spm.blogspot.com/2012/03/base-quantity-and-derived-quantity.html">1 A</a><o:p></o:p></div>
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2 A<o:p></o:p></div>
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<a href="http://physicsf45spm.blogspot.com/2012/03/scientific-method.html">3 A</a><o:p></o:p></div>
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4 B<o:p></o:p></div>
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<a href="http://physicsf45spm.blogspot.com/2012/03/measurements-in-science.html">5 C</a><o:p></o:p></div>
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<a href="http://physicsf45spm.blogspot.com/2012/03/standard-form-scientific-notation.html">6 B</a><o:p></o:p></div>
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7 C<o:p></o:p></div>
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8 B<o:p></o:p></div>
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9 D<o:p></o:p></div>
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<a href="http://physicsf45spm.blogspot.com/2012/04/forces-and-motion-in-upper-secondary.html">10 B</a><o:p></o:p></div>
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11 A<o:p></o:p></div>
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12 D<o:p></o:p></div>
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<a href="http://physicsf45spm.blogspot.com/2012/12/forces-and-pressure_23.html">13 C</a><o:p></o:p></div>
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14 A<o:p></o:p></div>
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<a href="http://physicsf45spm.blogspot.com/2012/12/forces-and-pressure_23.html">15 D</a><o:p></o:p></div>
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<a href="http://physicsf45spm.blogspot.com/2012/12/forces-and-pressure_23.html">16 C</a><o:p></o:p></div>
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17 C<o:p></o:p></div>
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<a href="http://physicsf45spm.blogspot.com/2012/12/forces-and-pressure_23.html">18 C</a><o:p></o:p></div>
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19 A<o:p></o:p></div>
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<a href="http://physicsf45spm.blogspot.com/2012/12/forces-and-pressure_23.html">20 B</a><o:p></o:p></div>
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21 A<o:p></o:p></div>
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22 C<o:p></o:p></div>
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23 A<o:p></o:p></div>
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<a href="http://physicsf45spm.blogspot.com/2013/09/reflection-of-light.html">24 B</a><o:p></o:p></div>
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<a href="http://physicsf45spm.blogspot.com/2012/03/refraction-of-water-waves.html">25 C</a><o:p></o:p></div>
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<a href="http://physicsf45spm.blogspot.com/2012/03/refraction-of-water-waves.html">26 A</a><o:p></o:p></div>
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<a href="http://physicsf45spm.blogspot.com/2013/08/light-spm.html">27 A</a><o:p></o:p></div>
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<a href="http://physicsf45spm.blogspot.com/2012/03/refraction-of-water-waves.html">28 A</a><o:p></o:p></div>
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29 D<o:p></o:p></div>
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30 D<o:p></o:p></div>
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<a href="http://physicsf45spm.blogspot.com/2012/03/diffraction-of-light.html">31 C</a><o:p></o:p></div>
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<a href="http://physicsf45spm.blogspot.com/2012/03/refraction-of-water-waves.html">32 D</a><o:p></o:p></div>
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<a href="http://physicsf45spm.blogspot.com/2012/03/diffraction-of-light.html">33D</a><o:p></o:p></div>
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<a href="http://physicsf45spm.blogspot.com/2013/09/approximate-wavelength-formula-axd.html">34 B</a><o:p></o:p></div>
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35 B<o:p></o:p></div>
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36 B<o:p></o:p></div>
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37 A<o:p></o:p></div>
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38 C<o:p></o:p></div>
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39 C<o:p></o:p></div>
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40 A<o:p></o:p></div>
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41 D<o:p></o:p></div>
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42 B<o:p></o:p></div>
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43 D<o:p></o:p></div>
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44 A<o:p></o:p></div>
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45 A<o:p></o:p></div>
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46 D<o:p></o:p></div>
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47 B<o:p></o:p></div>
</td>
<td style="border-bottom: solid windowtext 1.0pt; border-left: none; border-right: solid windowtext 1.0pt; border-top: none; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt; padding: 0cm 5.4pt 0cm 5.4pt; width: 42.6pt;" valign="top" width="57"><div class="MsoNormal">
<a href="http://physicsf45spm.blogspot.com/2013/11/interesting-spm-2013-question-on-half.html">48 E</a><o:p></o:p></div>
</td>
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49 C<o:p></o:p></div>
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50 B</div>
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<br />
(My <b><a href="http://chemistryf45.blogspot.com/2013/11/2013-spm-chemistry-paper-1-answers.html">answers for SPM 2013 Chemistry Paper 1</a></b> can be viewed by clicking <a href="http://chemistryf45.blogspot.com/2013/11/2013-spm-chemistry-paper-1-answers.html"><b>here</b></a>.<br />
<br />
My <a href="http://addmathsf45.blogspot.com/2013/12/spm-2013-modern-maths-paper-1-14491.html"><b>answers for SPM 2013 Modern Maths Paper 1</b></a> (1449/1) are <a href="http://addmathsf45.blogspot.com/2013/12/spm-2013-modern-maths-paper-1-14491.html"><b>here</b></a>.)<br />
<div>
<br />
<u>My Comments on Some Physics P1 Questions</u>:<br />
<br /></div>
Q 30: The <b>answer is D</b>. More than twice before, 'telescope at normal adjustment' was tested in SPM:<br />
* In 2005 P2 Q11(a)(iii) - diagram @ pg. 387 of Past-Yr Papers 2005-2012 - D;<br />
* In 2006 P2 Q9(c)(i) - diagram @ pg. 393 of Past-Yr Papers 2005-2012 - D; and,<br />
* see also pg. 299 of Oxford-Fajar (2013 Ed.) Fig 5.67 for telescope - Answer D!<br />
<br />
Q32: The answer is D. Reason:<br />
<br />
"As water waves enter shallower region (at headland first, then only the bay), their speed slows down with the shortening of wavelength (again at headland first, then only the bay) without any change in wave frequency. This refraction of water waves results in the wavefronts taking the shape of the shoreline with wavelengths (distance between successive wavefronts) at the headland shorter than their corresponding wavelengths at the bay as shown by the diagram. At the bay, wave energy is spread-out over longer wavefronts resulting in calmer sea due to dispersal of wave energy. <b>Answer: D</b><br />
<br />
<o:p>For many other questions, I have inserted some hotlinks which you can click on to direct you to the relevant pages of this blog where the answers can be found/deduced. </o:p>For examples, if you click on the hotlink of:<br />
<div>
<br />
* Q 33 D, you will be directed to the page on "Diffraction" where its Para 6 has the same diagram as in the answer D (but in different orientation);<br />
<br />
* Q 32 D, you will be directed to the page on "Refraction of Waves" where its Para 7 shows similar diagram and the answer should be D;<br />
<br />
* Q 31 C, you will be directed to the page on "Diffraction" where its Para 2 shows C should be the answer;<br />
<br />
* Q 28 A, you will be directed to the page on "Refraction" where its Para 6, pt 1 shows you the answer;<br />
<br />
* Q 27 A, you will be directed to the page on "Light" where its Para 2(d)(v)(2) shows you the answer;<br />
<br />
* Q 26 A, you will be directed to the page on "Refraction" where its Para 6, pt 1 shows you the answer;<br />
<br />
* Q 25 C, you will be directed to the page on "Refraction" where its 2nd Para 6 shows you the answer;<br />
and, so on......<br />
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<b style="background-color: white; color: #333333; font-family: Arial, Tahoma, Helvetica, FreeSans, sans-serif; font-size: 14.85px; line-height: 20.79px;"><u>Need Help In Physics, Chemistry and Maths in or around Petaling Jaya?</u></b><br />
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(June 18th, 2017):<br />
<br />
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<br />
Summer May/June 2017 IGCSE O-level and Edexcel O-level exams were just over. As
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<b>Physics 0625</b> (Nicole Gan scored A* (93%), Lim Jin Quan A* (mark NA),...) <br />
<b>Chemistry 0620; </b>(Nicole Gan scored A* (94%), Lim Jin Quan A* (mark NA),...)<br />
<b><br /></b>* Edexcel: <b>Maths 4MAO / 4MBO / 4PMO</b> (Previously taught 4MBO / 4PMO at Int'l Sch)<br />
<b> Chemistry 4CHO </b>(Just tutored Ms. McLean Maths 4MAO, Chem n Physics)<br />
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Sms or whatsapp me <b>Douglas at: 011-2120 1608</b>; or,<br />
Email: <b>tutortan1@gmail.com</b><br />
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Thank you.<br />
<br />
Douglas<br />
<br /></div>
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MR. Tan (tutortan1@gmail.com)http://www.blogger.com/profile/14597183604923036693noreply@blogger.com7tag:blogger.com,1999:blog-8073878804223260414.post-10966424634012180412013-11-26T10:01:00.000+08:002016-05-30T12:50:44.355+08:00Interesting SPM 2013 Question on Half-Life<div dir="ltr" style="text-align: left;" trbidi="on">
1) SPM 2013 Physics Paper 1 has an interesting question on half-life calculation.<br />
<br />
<b>Q 48 reads:</b><br />
<b><br /></b>
<b>"25% of Gallium-65 atoms have decayed after 15 minutes. What is the half-life of Gallium-65?</b><br />
<br />
<b>A</b> 30.0 minutes<br />
<br />
<b>B</b> 23.4 minutes<br />
<br />
<b>C</b> 15.0 minutes<br />
<br />
<b>D</b> 7.5 minutes<br />
<br />
(Shouldn't there be another choice, say:<br />
<br />
<b>E</b> 36+ minutes?)<br />
<br />
<b><u>My Comments (based on info given in the Q48)</u></b>:<br />
<br />
<u>Half-life of Gallium-65 based on info given in the Q48:</u><br />
25% have decayed means 75% have not decayed. And that means, its half-life > 15 minutes. So was the half-life A, B or none of the 4 given choices? Do you not agree that the half life should be calculated as follows:<br />
<br />
<div class="MsoNormal">
<b><u>The 1/4-life Method:</u></b></div>
<div class="MsoNormal">
<b><u><br /></u></b></div>
<div class="MsoNormal">
<u>At the end of 15 minutes (1st 1/4-life)</u>: </div>
<div class="MsoNormal">
a) amount decayed = 25% = <b>¼</b> of original amount</div>
<div class="MsoNormal">
b) amount undecayed = 75% = ¾ of original amount</div>
<div class="MsoNormal">
<o:p></o:p></div>
<div class="MsoNormal">
<br /></div>
<div class="MsoNormal">
<u>At the end of 30<sup> </sup>minutes (2nd 1/4-life)</u>: </div>
<div class="MsoNormal">
a) amount decayed<span style="text-indent: 36pt;"> </span><span style="text-indent: 36pt;">= </span><b style="text-indent: 36pt;">¼</b><span style="text-indent: 36pt;"> x ¾ of original amount = 3/16 of original amount</span></div>
<div class="MsoNormal">
<span style="text-indent: 36pt;">b) total amount decayed = (¼ + 3/16) of original amount </span><span style="text-indent: 36pt;">= 7/16 of the original amount</span></div>
<div class="MsoNormal" style="margin-left: 108pt; text-indent: 36pt;">
<o:p></o:p></div>
<div class="MsoNormal">
c) total amount undecayed = (1 – 7/16) of original amount = 9/16 of the original amount</div>
<div class="MsoNormal">
<o:p></o:p></div>
<div class="MsoNormal">
<br /></div>
<div class="MsoNormal">
<u>To decay to ½ (or 8/16) of original amount</u>:</div>
<div class="MsoNormal">
<span style="text-indent: -18pt;">a)</span><span style="font-size: 7pt; text-indent: -18pt;"> </span><span style="text-indent: -18pt;">A further 1/16 is to be decayed</span></div>
<div class="MsoNormal">
<span style="text-indent: -18pt;">b)</span><span style="font-size: 7pt; text-indent: -18pt;"> </span><span style="text-indent: -18pt;">1/16 = [(</span><b style="text-indent: -18pt;">1/4</b><span style="text-indent: -18pt;">) x (9/16)] x (4/9)</span></div>
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<span style="text-indent: -18pt;">c)</span><span style="font-size: 7pt; text-indent: -18pt;"> </span><span style="text-indent: -18pt;">Time needed = [15 minutes] x (4/9) </span>= 6.67 minutes</div>
<div class="MsoListParagraphCxSpMiddle" style="margin-left: 216pt;">
<o:p></o:p></div>
<div class="MsoListParagraphCxSpMiddle" style="margin-left: 216pt;">
<br /></div>
<div class="MsoListParagraphCxSpLast" style="margin-left: 0cm;">
<u><b>Therefore, half-life</b></u> = (15 + 15 + 6.67) minutes<o:p></o:p></div>
<span style="font-family: "times new roman" , "serif"; font-size: 12pt;"> = <b><u>36.67minutes</u></b></span><br />
<span style="font-family: "times new roman" , "serif"; font-size: 12pt;"><b><u><br /></u></b></span><span style="font-family: "times new roman" , serif;">Answer <b>A </b>(30 minutes) cannot be the acceptable answer because in 30 minutes only 7/16 and not 1/2 (or 8/16) of the radioactive substance has decayed. Conceptually, <b>A</b> is a wrong answer. Q48, to me, has no acceptable answers. This is also confirmed by logarithm method of calculating half-life as follows:</span><br />
<div class="MsoNormal">
<b><u><br /></u></b>
<b><u>Logarithm Method to Calculate Number of Half-Lives:</u></b></div>
<div class="MsoNormal">
<br /></div>
<div class="MsoNormal">
Let: n = number of
half-lives<o:p></o:p></div>
<div class="MsoNormal" style="text-align: justify;">
A<sub>o</sub>
= Original amount of radioactive substance (or original level of radioactivity)<o:p></o:p></div>
<div class="MsoNormal" style="text-align: justify;">
A<sub>c</sub>
= Current amount of radioactive substance (or current level of radioactivity)<o:p></o:p></div>
<div class="MsoNormal">
<br /></div>
<div class="MsoNormal" style="text-indent: 36.0pt;">
Then, (1/2)<sup>n</sup> x A<sub>o</sub> = A<sub>c</sub> <o:p></o:p></div>
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(1/2)<sup>n</sup> = A<sub>c</sub>/A<sub>o</sub><o:p></o:p></div>
<div class="MsoNormal">
(1/2)<sup>n</sup>
= 0.75A<sub>o</sub>/A<sub>o</sub> = 0.75<o:p></o:p></div>
<div class="MsoNormal">
<br /></div>
<div class="MsoNormal" style="text-indent: 36.0pt;">
<span style="font-family: "cambria math" , "serif";">log
both sides:</span><span style="font-family: "cambria math" , serif;"> log
</span>(1/2)<sup>n</sup> = log (0.75)</div>
<div class="MsoNormal">
<span style="font-family: "cambria math" , "serif";"> </span><span style="font-family: "cambria math" , serif;">Hence, <b><u>n
= log (</u></b></span><b><u>0.75) ÷
log (1/2) = 0.415037499 half-life</u></b></div>
<div class="MsoNormal">
<br /></div>
<div class="MsoNormal">
<b><u>To Calculate the
Half-Life, T</u><sub>1/2</sub></b><o:p></o:p></div>
<div class="MsoNormal">
<br /></div>
<div class="MsoNormal">
Let T<sub>1/2</sub>
= Half-life time<o:p></o:p></div>
<div class="MsoNormal">
T<sub>o</sub>
= Time as at original amount of radioactive substance <o:p></o:p></div>
<div class="MsoNormal" style="margin-left: 36.0pt; text-indent: 36.0pt;">
(or original
level of radioactivity)<o:p></o:p></div>
<div class="MsoNormal">
T<sub>c</sub>
= Time as at current amount of radioactive substance <o:p></o:p></div>
<div class="MsoNormal" style="margin-left: 36.0pt; text-indent: 36.0pt;">
(or current
level of radioactivity)<o:p></o:p></div>
<div class="MsoNormal">
n = number
of half-lives<o:p></o:p></div>
<div class="MsoNormal">
<br /></div>
<div class="MsoNormal">
Then, <b><u>T<sub>1/2</sub> = (T<sub>c</sub> - T<sub>o</sub>)
÷ n = 15 minutes ÷ n = 15 min ÷ [</u></b><b><u><span style="font-family: "cambria math" , "serif";">log (</span>0.75) ÷ log (1/2)]<o:p></o:p></u></b></div>
<div class="MsoNormal">
<br /></div>
<div class="MsoNormal">
<b><u>T<sub>1/2</sub> = 36.14131259<o:p></o:p></u></b></div>
<div class="MsoNormal">
<br /></div>
<div class="MsoNormal">
<span style="font-family: "times new roman" , "serif"; font-size: 12.0pt;"> <b><u>T<sub>1/2</sub> = 36.1 minutes</u></b></span></div>
<br />
Based on <b>facts given in Q48</b>, <b>logarithm method</b> shows a half-life 36.1 minutes.<br />
<br />
But <b>online searches</b> (please click <a href="http://en.wikipedia.org/wiki/Isotopes_of_gallium">here</a> or <a href="http://periodictable.com/Isotopes/031.65/index3.html">here</a>) show that isotopes Gallium-65 actually have a half-life of 15.2 minutes<br />
<br />
So, <b>which is the examiners' preferred answer and why?</b><br />
<br />
Isn't this question both interesting and bewildering?! :)<br />
<br />
<div class="MsoNormal">
In conclusion: Overall, except for Q48, Paper 1 is still a good paper - of respectable standard! :)<br />
<br />
(10.4.2014: The examiners should have replaced the words "Gallium-65" in Q 48 with the words "isotopes-X". Otherwise, it's like a biology question on man that talks about the man having ovaries, uterus, etc. that makes the candidates wonder whether it is a question about man or something else. The more well-read the students, the more disadvantaged he/she would be - that is ridiculous!)</div>
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MR. Tan (tutortan1@gmail.com)http://www.blogger.com/profile/14597183604923036693noreply@blogger.com0tag:blogger.com,1999:blog-8073878804223260414.post-80824636652105380172013-09-18T09:58:00.000+08:002019-12-18T23:03:09.979+08:002 Significant Errors in Malaysian Form 5 Physics and Chemistry Textbooks (KBSM)<div dir="ltr" style="text-align: left;" trbidi="on">
<div class="gE iv gt" style="background-color: white; color: #222222; cursor: auto; font-family: arial, sans-serif; font-size: 13px; padding: 12px 0px 3px;">
<table cellpadding="0" class="cf gJ" style="border-collapse: collapse; margin-top: 0px; width: auto;"><tbody>
<tr class="acZ" style="height: 16px;"><td class="gF gK" style="margin: 0px; padding-right: 8px; padding-top: 0px; vertical-align: top; white-space: nowrap; width: 473px;"><span style="color: #222222; font-size: x-small;">On 10/9/2013, I wrote to Ministry of Education on the above matter; and I am glad to say that the Ministry </span><br />
<span style="color: #222222; font-size: x-small;">has agreed with my findings. And, what is heartening is that the Ministry replied <b><u>within 8 days</u></b> - Excellent job to all concerned </span><br />
<span style="color: #222222; font-size: x-small;">at the </span><span style="color: #222222; font-size: x-small;">Ministry of Education. The lady who handled my call - to get the correct email to send my mail - was very professional.</span><br />
<span style="color: #222222; font-size: x-small;"><br /></span>
<span style="color: #222222; font-size: x-small;">I therefore urge all educated parents to be vigilant and proactive about errors they detect in their kid's </span><span style="color: #222222; font-size: x-small;">textbooks - </span><br />
<span style="color: #222222; font-size: x-small;">do write to the Ministry for actions because we don't want our kids to study the wrong things and give the </span><br />
<span style="color: #222222; font-size: x-small;">correct "wrong" answers in their public exams. </span><br />
<span style="color: #222222; font-size: x-small;"><br /></span>
<span style="color: #222222; font-size: x-small;">With that, may I wish all school children sitting for PMR and SPM<br /> </span><span style="color: #222222; font-size: x-small;">very soon: Good Luck and Best Wishes!!!</span><br />
<span style="color: #222222; font-size: x-small;"><br /></span>
<span style="color: #222222; font-size: x-small;">(P/s: Only 2 significant errors for the many pages that I have gone through - really not bad!)</span><br />
<span style="color: #222222; font-size: x-small;"><br /></span><span style="color: #222222; font-size: x-small;">Here are my letter and the Ministry's reply:</span><span style="color: #222222; font-size: x-small;"><br /></span><span style="color: #222222; font-size: x-small;"><br /></span><br />
<span style="color: #222222; font-size: x-small;">My letter:</span><br />
<br /></td><td class="gH" style="color: #222222; margin: 0px; text-align: right; vertical-align: top; white-space: nowrap;"><br /></td><td class="gH" style="color: #222222; margin: 0px; text-align: right; vertical-align: top; white-space: nowrap;"><br /></td><td class="gH acX" rowspan="2" style="color: #222222; margin: 0px; text-align: right; vertical-align: top; white-space: nowrap;"><br /></td></tr>
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<span style="font-family: "arial";">"10/9/2013</span></div>
<div>
<span style="font-family: "arial";"></span></div>
<div>
<span style="font-family: "arial";"><br /></span></div>
<div>
<span style="font-family: "arial";">To: Whom It May Concern</span></div>
<div>
<span style="font-family: "arial";"><br /></span></div>
<div>
<span style="font-family: "arial";">From: A Concerned Parent</span></div>
<div>
<span style="font-family: "arial";"></span></div>
<div>
<span style="font-family: "arial";"><br /></span></div>
<div>
<span style="font-family: "arial";">Re: Significant Errors in Malaysian Form 5 Physics and Chemistry Textbooks (KBSM)</span></div>
<div>
<span style="font-family: "arial";"></span></div>
<div>
<span style="font-family: "arial";"><br /></span></div>
<div>
<span style="font-family: "arial";">In good faith, I write to inform about what I think are significant errors in the above-mentioned Form 5 Science Stream textbooks.</span></div>
<div>
<span style="font-family: "arial";"></span></div>
<div>
<span style="font-family: "arial";"><br /></span></div>
<div>
<span style="font-family: "arial";">If the Ministry agrees that they are indeed serious errors, I sincerely hope that "Corrections Circulars" can be sent out urgently to notify all relevant parties - particularly to the Form 5 Science students who will be sitting for their SPM exams. very soon. The errors:</span></div>
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<span style="font-family: "arial";"><br /></span></div>
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<span style="font-family: "arial";"></span></div>
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<span style="font-family: "arial";">1. Form 5 Physics Textbook (KBSM):</span></div>
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<span style="font-family: "arial";"></span></div>
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<ul style="color: #333333; font-family: Arial, Tahoma, Helvetica, FreeSans, sans-serif; font-size: 15px; line-height: 20px; margin: 0.5em 0px; padding: 0px 2.5em;">
<li style="border: medium none; margin: 0px 0px 0.25em; padding: 0px;">At page 13: the 2nd paragraph on refraction: "By comparing the angle of incidence, i with angle of refraction, r in Figure 1.19, you will find that when <b>waves travel from a denser medium to a less dense medium</b>, <b>they are refracted <u><i>towards the normal</i></u></b>." The correct underlined wordings should be "<u><i><b>away from normal</b></i></u>" and not "<i><u><b>towards the normal</b></u></i>" . This is a very serious fundamental error!</li>
<li style="border: medium none; margin: 0px 0px 0.25em; padding: 0px;"><br /></li>
</ul>
</div>
<div>
<span style="font-family: "arial";"></span></div>
<div>
<span style="font-family: "arial";">2. Form 5 Chemistry Textbook (KBSM):</span></div>
<ul>
<li style="margin-left: 15px;"><span style="font-family: "arial";">At page 188: The chemical formula for "lauryl alcohol" was given twice there as <span style="font-family: "times new roman" , serif; font-size: 12pt;">CH<sub>3</sub>(CH<sub>2</sub>)<sub><span style="color: red;">9</span></sub>CH<sub>2</sub>OH. The correct chemical formula for "lauryl alcohol" should be: CH<sub>3</sub>(CH<sub>2</sub>)<sub><b>10</b></sub>CH<sub>2</sub>OH (error highlighted in red).</span></span></li>
</ul>
<div>
<span style="font-family: "arial";">I would be grateful for your follow-up actions.</span></div>
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<span style="font-family: "arial";"></span></div>
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<span style="font-family: "arial";"><br /></span></div>
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<span style="font-family: "arial";">Thank you.</span></div>
<div>
<span style="font-family: "arial";"></span></div>
<div>
<span style="font-family: "arial";"><br /></span></div>
<div>
<span style="font-family: "arial";">Sincerely,</span></div>
<div>
<span style="font-family: "arial";">Douglas Tan</span></div>
<div>
<span style="font-family: "arial";">(Handphone: 011-2328 xxxx)</span></div>
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<span style="font-family: "arial";"><br /></span></div>
<div>
<span style="font-family: "arial";">----------------------------------------------------------------------------------------------------------------------------------</span></div>
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<span style="font-family: "arial";"><br /></span></div>
<div>
<span style="font-family: "arial";"><b><u>Ministry of Education's Reply</u></b>:</span></div>
<div>
<br />
<span style="font-family: "arial";">"</span><i style="color: #17365d; font-family: 'Lucida Bright', serif; font-size: 11px;">Rough translation of the Ministry's reply (please see below for the original):</i><br />
<div style="color: black; font-family: 'Times New Roman'; font-size: medium;">
<span style="color: #17365d; font-family: "lucida bright" , serif;"><span style="font-size: 11px;"><i><br /></i></span></span></div>
<div style="color: black; font-family: 'Times New Roman'; font-size: medium;">
<span style="color: #17365d; font-family: "lucida bright" , serif;"><span style="font-size: 11px;"><i>Mr. Douglas Tan.</i></span></span></div>
<div style="color: black; font-family: 'Times New Roman'; font-size: medium;">
<span style="color: #17365d; font-family: "lucida bright" , serif;"><span style="font-size: 11px;"><i><br /></i></span></span></div>
<div style="color: black; font-family: 'Times New Roman'; font-size: medium;">
<span style="color: #17365d; font-family: "lucida bright" , serif;"><span style="font-size: 11px;"><i>Sir,</i></span></span></div>
<div style="color: black; font-family: 'Times New Roman'; font-size: medium;">
<span style="color: #17365d; font-family: "lucida bright" , serif;"><span style="font-size: 11px;"><i><br /></i></span></span></div>
<div style="color: black; font-family: 'Times New Roman'; font-size: medium;">
<span style="color: #17365d; font-family: "lucida bright" , serif;"><span style="font-size: 11px;"><i>1. With respect, I refer to your email...</i></span></span></div>
<div style="color: black; font-family: 'Times New Roman'; font-size: medium;">
<span style="color: #17365d; font-family: "lucida bright" , serif;"><span style="font-size: 11px;"><i><br /></i></span></span></div>
<div style="color: black; font-family: 'Times New Roman'; font-size: medium;">
<span style="color: #17365d; font-family: "lucida bright" , serif;"><span style="font-size: 11px;"><i>2. Your statement about the factual errors has been referred to ...(of the Ministry) for scrutiny/investigation/study.</i></span></span></div>
<div style="color: black; font-family: 'Times New Roman'; font-size: medium;">
<span style="color: #17365d; font-family: "lucida bright" , serif;"><span style="font-size: 11px;"><i><br /></i></span></span></div>
<div style="color: black; font-family: 'Times New Roman'; font-size: medium;">
<span style="color: #17365d; font-family: "lucida bright" , serif;"><span style="font-size: 11px;"><i>3. Upon our scrutiny/investigation/study, we found that there is basis to your statement about the factual errors.</i></span></span></div>
<div style="color: black; font-family: 'Times New Roman'; font-size: medium;">
<span style="color: #17365d; font-family: "lucida bright" , serif;"><span style="font-size: 11px;"><i><br /></i></span></span></div>
<div style="color: black; font-family: 'Times New Roman'; font-size: medium;">
<span style="color: #17365d; font-family: "lucida bright" , serif;"><span style="font-size: 11px;"><i>4. We will carry-out immediate remedial and follow-up actions on the matter.</i></span></span></div>
<div style="color: black; font-family: 'Times New Roman'; font-size: medium;">
<span style="color: #17365d; font-family: "lucida bright" , serif;"><span style="font-size: 11px;"><i><br /></i></span></span></div>
<div style="color: black; font-family: 'Times New Roman'; font-size: medium;">
<span style="color: #17365d; font-family: "lucida bright" , serif;"><span style="font-size: 11px;"><i>5. We thank you for your pro-activeness and working together on the matter.</i></span></span></div>
<div style="color: black; font-family: 'Times New Roman'; font-size: medium;">
<span style="color: #17365d; font-family: "lucida bright" , serif;"><span style="font-size: 11px;"><i><br /></i></span></span></div>
<div style="color: black; font-family: 'Times New Roman'; font-size: medium; text-align: right;">
</div>
<span style="font-family: "arial";">Thank you.</span><span style="font-family: "arial";">"</span><br />
<span style="font-family: "arial";">-------------------------------------------------------------------------------------------------------------------------------</span><br />
<span style="font-family: "arial";"><br /></span>
<span style="font-family: "arial";">The original:</span></div>
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<span class="gD" email="ramlan@moe.gov.my" name="Ramlan Abu Talib" style="color: #222222; display: inline; font-size: 13px; font-weight: bold; vertical-align: top;">Ramlan Abu Talib</span> <span class="go" style="color: #555555; vertical-align: top;"><ramlan@moe.gov.my></span></div>
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<span alt="Wed, Sep 18, 2013 at 8:51 AM" class="g3" id=":p9" style="margin-right: 3px; vertical-align: top;" title="Wed, Sep 18, 2013 at 8:51 AM">8:51 AM (1 hour ago)</span><br />
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<span class="hb" style="color: #777777; vertical-align: top;">to <span class="g2" dir="ltr" email="tutortan1@gmail.com" name="me" style="vertical-align: top;">me</span>, <span class="g2" dir="ltr" email="pengarahbbt@moe.gov.my" name="Pengarah" style="vertical-align: top;">Pengarah</span>, <span class="g2" dir="ltr" email="paridin.jais@moe.gov.my" name="Paridin" style="vertical-align: top;">Paridin</span>, <span class="g2" dir="ltr" email="noh.muda@moe.gov.my" name="Che" style="vertical-align: top;">Che</span>, <span class="g2" dir="ltr" email="krishnan.ponnusamy@moe.gov.my" name="Krishnan" style="vertical-align: top;">Krishnan</span>, <span class="g2" dir="ltr" email="hilmi.syed@moe.gov.my" name="Syed" style="vertical-align: top;">Syed</span>, <span class="g2" dir="ltr" email="sim.siawwei@moe.gov.my" name="Sim" style="vertical-align: top;">Sim</span>, <span class="g2" dir="ltr" email="sidqi.ghafar@moe.gov.my" name="Wan" style="vertical-align: top;">Wan</span></span></div>
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<b><i><span style="color: #17365d; font-family: "lucida bright" , serif; font-size: 8pt;">En. Douglas Tan,</span></i></b></div>
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<b><i><span style="color: #17365d; font-family: "lucida bright" , serif; font-size: 8pt;">Tuan,</span></i></b></div>
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<b><i><span style="color: #17365d; font-family: "lucida bright" , serif; font-size: 8pt;">1.<span style="font-family: "times new roman"; font-size: 7pt; font-style: normal; font-weight: normal;"> </span></span></i></b><b><i><span style="color: #17365d; font-family: "lucida bright" , serif; font-size: 8pt;">Saya dengan hormatnya merujuk kepada e-mel tuan kepada Bahagian Buku Teks, Kementerian Pendidikan Malaysia, bertarikh 10 September 2013 berhubung perkara di atas.</span></i></b></div>
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<br /></div>
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<b><i><span style="color: #17365d; font-family: "lucida bright" , serif; font-size: 8pt;">2.<span style="font-family: "times new roman"; font-size: 7pt; font-style: normal; font-weight: normal;"> </span></span></i></b><b><i><span style="color: #17365d; font-family: "lucida bright" , serif; font-size: 8pt;">Penyataan tuan terhadap kesilapan fakta dalam buku teks Physics Form 5 dan Chemistry Porm 5 KBSM telah dirujuk kepada Sektor Penerbitan Sekolah Menengah untuk penelitian.</span></i></b></div>
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<b><i><span style="color: #17365d; font-family: "lucida bright" , serif; font-size: 8pt;">3.<span style="font-family: "times new roman"; font-size: 7pt; font-style: normal; font-weight: normal;"> </span></span></i></b><b><i><span style="color: #17365d; font-family: "lucida bright" , serif; font-size: 8pt;">Setelah dibuat penelitian , pihak kami mendapati bahawa penyataan pihak tuan terhadap hal ini mempunyai asas.</span></i></b></div>
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<b><i><span style="color: #17365d; font-family: "lucida bright" , serif; font-size: 8pt;">4.<span style="font-family: "times new roman"; font-size: 7pt; font-style: normal; font-weight: normal;"> </span></span></i></b><b><i><span style="color: #17365d; font-family: "lucida bright" , serif; font-size: 8pt;">Pihak kami akan melaksanakan tindakan penambahbaikan dan tindakan susulan terhadap hal ini dengan segera.</span></i></b></div>
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<b><i><span style="color: #17365d; font-family: "lucida bright" , serif; font-size: 8pt;">5.<span style="font-family: "times new roman"; font-size: 7pt; font-style: normal; font-weight: normal;"> </span></span></i></b><b><i><span style="color: #17365d; font-family: "lucida bright" , serif; font-size: 8pt;">Pihak kami mengucapkan terima kasih di atas keprihatinan dan kerjasama tuan terhadap hal ini.</span></i></b></div>
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<b><i><span style="color: #17365d; font-family: "lucida bright" , serif; font-size: 8pt;">Sekian, terima kasih.</span></i></b></div>
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<b><i><span lang="EN-US" style="color: #17365d; font-family: "brush script mt"; font-size: 8pt;"> ..</span></i></b><b><span lang="EN-US" style="color: #17365d; font-family: "edwardian script itc";">Ramlan</span></b><b><i><span lang="EN-US" style="color: #17365d; font-family: "brush script mt"; font-size: 8pt;">...</span></i></b></div>
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MR. Tan (tutortan1@gmail.com)http://www.blogger.com/profile/14597183604923036693noreply@blogger.com0tag:blogger.com,1999:blog-8073878804223260414.post-63931587667761819892013-09-17T14:57:00.002+08:002016-07-03T13:53:34.543+08:00Approximate Wavelength Formula, λ = ax/D<div dir="ltr" style="text-align: left;" trbidi="on">
<b>Approximate Formula for Wavelength</b> (<span style="font-family: "times new roman" , serif; font-size: 12pt;"><b>λ</b></span><b> = ax/D</b>) from <b>Interference Pattern</b>:<br />
<ul>
<li>Where, <span style="font-family: "times new roman" , serif; font-size: 12pt;"><b>λ</b></span> = wavelength</li>
</ul>
<b>a</b> = distance between the 2 coherent wave sources<br />
<br />
<b>x</b> = distance between 2 adjacent antinodal lines<br />
(radiating ripples or interference fringes or points of loudness)<br />
<br />
<b>D</b> = perpendicular distance between the parallel lines<br />
where a and x are measured<br />
<div style="text-align: left;">
<ul>
<li>Empirical evidence from experiment shows:</li>
</ul>
<ul style="text-align: left;"><ul>
<li>that<b> x</b> is directly proportional to <span style="font-family: "times new roman" , serif; font-size: 12pt;"><b>λ</b></span></li>
</ul>
</ul>
<ul style="text-align: left;"><ul>
<li>that <b>x</b> is inversely proportional to <b>a</b></li>
</ul>
</ul>
<ul style="text-align: left;"><ul>
<li>therefore, mathematically, <b>x</b> = k<span style="font-family: "times new roman" , serif; font-size: 12pt;"><b>λ</b></span>/<b>a</b>, where k is found to be = D</li>
</ul>
</ul>
<ul style="text-align: left;"><ul>
<li>Thus, <b>x = D<span style="font-family: "times new roman" , serif; font-size: 12pt;">λ</span>/a</b></li>
</ul>
</ul>
<ul style="text-align: left;"><ul>
<li>And, changing the subject of formula, we have: <span style="font-family: "times new roman" , serif; font-size: 12pt;"><b>λ</b></span><b> = ax/D</b></li>
</ul>
</ul>
<ul>
<li>Application 1: The "<b>Approximate Wavelength Formula, </b><span style="font-family: "times new roman" , serif; font-size: 12pt;"><b>λ</b></span><b> = ax/D</b>" can be used to find the wavelength of waves from their interference patterns as <b>a</b>, <b>x</b> and <b>D</b> can be determined from the interference pattern. </li>
</ul>
<ul style="text-align: left;">
<li>Application 2: From the same formula <b><span style="font-family: "times new roman" , serif; font-size: 12pt;">λ</span> = ax/D </b>or<b> </b><b>x = D<span style="font-family: "times new roman" , serif; font-size: 12pt;">λ</span>/a (same formula with different subjects)</b></li>
<ul>
<li>The i<b>nterference pattern</b> of <b>red, green or blue light</b> can all be explained by the "<b>Approximate Wavelength Formula, </b><b>x = D<span style="font-family: "times new roman" , serif; font-size: 12pt;">λ</span>/a</b>" </li>
</ul>
</ul>
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" /> <b>x<sub> red</sub> > x<sub>blue</sub></b></div>
<div class="MsoNormal">
<sub><o:p></o:p></sub></div>
<div style="text-align: left;">
<img src="http://www.saburchill.com/physics/images4/181103008.jpg" height="144" width="320" /><br />
<ul style="text-align: left;"><ul>
<li>The distance between adjacent fringes <b>x</b> of red light is bigger than that of green or blue light because the wavelength of red light (<span style="font-family: "times new roman" , serif;"><span style="font-size: small;">λ</span><sub><span style="font-size: small;"> red</span></sub></span>) is longer as compared to that of green light (<span style="font-family: "times new roman" , serif; font-size: 12pt;">λ<sub>green</sub></span>) or blue light.</li>
</ul>
</ul>
<ul style="text-align: left;"><ul>
<li>Since <span style="font-family: "times new roman" , serif; font-size: 12pt;">λ<sub> red</sub> > λ<sub>green</sub> > λ<sub>blue, </sub></span>from <b>x = D</b><span style="font-family: "times new roman" , serif; font-size: 12pt; font-weight: bold;">λ</span><b>/a,</b> therefore, x<sub> red</sub> > x<sub>green</sub> > x<sub>blue.</sub></li>
</ul>
</ul>
<span style="font-size: x-small;">--------------------------------------------------------------------------------</span><br />
<span style="font-size: x-small;"><br /></span>
<br />
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MR. Tan (tutortan1@gmail.com)http://www.blogger.com/profile/14597183604923036693noreply@blogger.com0tag:blogger.com,1999:blog-8073878804223260414.post-26019288059376957562013-09-12T11:34:00.000+08:002016-07-03T13:54:30.182+08:00Reflection of Light<div dir="ltr" style="text-align: left;" trbidi="on">
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<!--[if !supportLists]-->1.<span style="font-size: 7pt;">
</span><!--[endif]-->Law of Reflection:<o:p></o:p></div>
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<ul style="text-align: left;">
<li><span style="color: #333333; font-family: "symbol"; font-size: 10pt; line-height: 15pt; text-indent: -18pt;">·<span style="font-family: "times new roman"; font-size: 7pt; line-height: normal;"> </span></span><span style="color: #333333; font-family: "arial" , sans-serif; font-size: 11.5pt; line-height: 15pt; text-indent: -18pt;">The angle of incidence, Ө<sub>i</sub> = The angle of reflection,
Ө<sub>r</sub> </span></li>
<li><span style="color: #333333; font-family: "symbol"; font-size: 10pt; line-height: 15pt; text-indent: -18pt;">·<span style="font-family: "times new roman"; font-size: 7pt; line-height: normal;"> </span></span><span style="color: #333333; font-family: "arial" , sans-serif; font-size: 11.5pt; line-height: 15pt; text-indent: -18pt;">The incident ray, the reflected ray and the normal lie in the
same plane. </span></li>
</ul>
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<o:p> </o:p><img src="https://encrypted-tbn2.gstatic.com/images?q=tbn:ANd9GcTQOEJV1p77B1Ym3m1STD_TgtcssiSwL6IG5JDYyrhwq5zJwpjk" /></div>
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<br /></div>
<div class="MsoListParagraphCxSpMiddle" style="margin-left: 72.0pt; mso-add-space: auto; mso-list: l1 level2 lfo3; tab-stops: list 72.0pt; text-indent: -18.0pt;">
<!--[if !supportLists]--><span style="color: #333333; font-family: "symbol"; font-size: 10.0pt;">·<span style="font-family: "times new roman"; font-size: 7pt;">
</span></span><!--[endif]--><span style="color: #333333; font-family: "arial" , "sans-serif"; font-size: 11.5pt;">The normal is the line drawn at right angle to the mirror where
the ray strikes<o:p></o:p></span></div>
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<!--[if !supportLists]--><span style="color: #333333; font-family: "symbol"; font-size: 10.0pt;">·<span style="font-family: "times new roman"; font-size: 7pt;">
</span></span><!--[endif]--><span style="color: #333333; font-family: "arial" , "sans-serif"; font-size: 11.5pt;">The angle of deviation of a ray is the angle between what would
have been the direction of the original ray and the actual direction of the
deviated ray.) <o:p></o:p></span></div>
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<o:p> </o:p><o:p> </o:p> </div>
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<!--[if !supportLists]-->2.<span style="font-size: 7pt;">
</span><!--[endif]-->Image Formed by Reflection:<o:p></o:p></div>
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<!--[if !supportLists]-->a.<span style="font-size: 7pt;">
</span><!--[endif]-->Plane Mirror<o:p></o:p></div>
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<br /></div>
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<!--[if !supportLists]--><span style="font-size: 7pt;">
</span>i.<span style="font-size: 7pt;">
</span><!--[endif]-->What is a plane mirror?<o:p></o:p></div>
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A plane mirror is a flat, smooth and reflective surface which reflects in
uniform direction light falling on it.<o:p></o:p></div>
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<br /></div>
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<!--[if !supportLists]--><span style="font-size: 7pt;">
</span>ii.<span style="font-size: 7pt;">
</span><!--[endif]-->Characteristics of image formed by reflection in a
plane mirror:<o:p></o:p></div>
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<div class="MsoListParagraphCxSpMiddle" style="margin-left: 70.9pt; mso-add-space: auto; mso-list: l2 level7 lfo1; text-indent: -14.2pt;">
<!--[if !supportLists]-->1.<span style="font-size: 7pt;">
</span><!--[endif]-->Virtual – A virtual image cannot be formed on a screen;<o:p></o:p></div>
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<br /></div>
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<!--[if !supportLists]-->2.<span style="font-size: 7pt;">
</span><!--[endif]-->Same size as the object (congruent);<o:p></o:p></div>
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<br /></div>
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<!--[if !supportLists]-->3.<span style="font-size: 7pt;">
</span><!--[endif]-->Upright;<o:p></o:p></div>
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<div class="MsoListParagraphCxSpMiddle" style="margin-left: 70.9pt; mso-add-space: auto; mso-list: l2 level7 lfo1; text-indent: -14.2pt;">
<!--[if !supportLists]-->4.<span style="font-size: 7pt;">
</span><!--[endif]-->Laterally inverted – Left appears as right and right
appears as left;<o:p></o:p></div>
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<img src="http://images.tutorvista.com/content/reflection-light/plane-mirror-image.jpeg" height="87" width="200" /></div>
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<!--[if !supportLists]-->5.<span style="font-size: 7pt;">
</span><!--[endif]-->The image is as far behind the mirror as the object is
in front;<o:p></o:p></div>
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<!--[if !supportLists]-->6.<span style="font-size: 7pt;">
</span><!--[endif]-->A line joining the image and the object would be:<o:p></o:p></div>
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<br /></div>
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<!--[if !supportLists]-->a.<span style="font-size: 7pt;">
</span><!--[endif]-->at right angle to the mirror (perpendicular); and,<o:p></o:p></div>
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<!--[if !supportLists]-->b.<span style="font-size: 7pt;">
</span><!--[endif]-->bisected by the mirror;<o:p></o:p></div>
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<br /></div>
<div class="MsoListParagraphCxSpMiddle" style="margin-left: 70.9pt; mso-add-space: auto; mso-list: l2 level7 lfo1; text-indent: -14.2pt;">
<!--[if !supportLists]-->7.<span style="font-size: 7pt;">
</span><!--[endif]-->The image would move:<o:p></o:p></div>
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<br /></div>
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<!--[if !supportLists]-->a.<span style="font-size: 7pt;">
</span><!--[endif]-->the same distance and at the same speed as the object
moves - towards or away from the mirror, following and depending on the object;<o:p></o:p></div>
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<br /></div>
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<!--[if !supportLists]-->b.<span style="font-size: 7pt;">
</span><!--[endif]-->twice the distance or twice the speed of the mirror as
the mirror moves - - towards or away from the object, following and depending
on the mirror;<o:p></o:p></div>
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<!--[if !supportLists]-->c.<span style="font-size: 7pt;">
</span><!--[endif]-->or rotate twice the angle of rotation of the mirror
about a point in the mirror in clockwise or anticlockwise direction, following
and depending on the mirror.<o:p></o:p></div>
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<br /></div>
<div class="MsoListParagraphCxSpMiddle" style="margin-left: 2.0cm; mso-add-space: auto; mso-list: l2 level6 lfo1; mso-text-indent-alt: -14.2pt; text-indent: -2.0cm;">
<!--[if !supportLists]--><span style="font-size: 7pt;">
</span>iii.<span style="font-size: 7pt;">
</span><!--[endif]-->Applications of Reflection in Plane Mirror.<o:p></o:p></div>
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<br /></div>
<div class="MsoListParagraphCxSpMiddle" style="margin-left: 78.0pt; mso-add-space: auto; mso-list: l2 level7 lfo1; text-indent: -21.3pt;">
<!--[if !supportLists]-->1.<span style="font-size: 7pt;">
</span><!--[endif]-->Household mirror - We need plane mirror half our height to fully view our full height as follows:<o:p></o:p></div>
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<img src="http://cr4.globalspec.com/PostImages/200809/Mirror_Problem_B11DA56C-E7F3-EEA7-485ABAFFD08D60BA.jpg" height="315" width="400" /></div>
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<br /></div>
<div class="MsoListParagraphCxSpMiddle" style="margin-left: 78.0pt; mso-add-space: auto;">
<br /></div>
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<!--[if !supportLists]-->2.<span style="font-size: 7pt;">
</span><!--[endif]-->Dance studio<o:p></o:p></div>
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<br /></div>
<div class="MsoListParagraphCxSpMiddle" style="margin-left: 78.0pt; mso-add-space: auto; mso-list: l2 level7 lfo1; text-indent: -21.3pt;">
<!--[if !supportLists]-->3.<span style="font-size: 7pt;">
</span><!--[endif]-->Optician’s eyesight testing room<o:p></o:p></div>
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<br /></div>
<div class="MsoListParagraphCxSpMiddle" style="margin-left: 78.0pt; mso-add-space: auto; mso-list: l2 level7 lfo1; text-indent: -21.3pt;">
<!--[if !supportLists]-->4.<span style="font-size: 7pt;">
</span><!--[endif]-->Mirror periscope<o:p></o:p></div>
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<br /></div>
<div class="MsoListParagraphCxSpMiddle" style="margin-left: 78.0pt; mso-add-space: auto; mso-list: l2 level7 lfo1; text-indent: -21.3pt;">
<!--[if !supportLists]-->5.<span style="font-size: 7pt;">
</span><!--[endif]-->Anti-parallax mirror (in Ammeters, Voltmeters, etc.)<o:p></o:p></div>
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<br /></div>
<div class="MsoListParagraphCxSpMiddle" style="margin-left: 78.0pt; mso-add-space: auto; mso-list: l2 level7 lfo1; text-indent: -21.3pt;">
<!--[if !supportLists]-->6.<span style="font-size: 7pt;">
</span><!--[endif]-->Laterally-inverted spelling of the word “AMBULANCE” at
the front part of ambulance so that driver of the front car when viewing
through his rear view mirror would read it as “AMBULANCE” and gives way
accordingly.<o:p></o:p></div>
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<br /></div>
<div class="MsoListParagraphCxSpMiddle" style="margin-left: 78.0pt; mso-add-space: auto; mso-list: l2 level7 lfo1; text-indent: -21.3pt;">
<!--[if !supportLists]-->7.<span style="font-size: 7pt;">
</span><!--[endif]-->Kaleidoscope<o:p></o:p></div>
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<br /></div>
<div class="MsoListParagraphCxSpMiddle" style="margin-left: 78.0pt; mso-add-space: auto; mso-list: l2 level7 lfo1; text-indent: -21.3pt;">
<!--[if !supportLists]-->8.<span style="font-size: 7pt;">
</span><!--[endif]-->Decoration to create feeling of spaciousness – in living
halls, hotel lobby, lift, etc.<o:p></o:p></div>
<div class="MsoListParagraphCxSpMiddle" style="margin-left: 78.0pt; mso-add-space: auto;">
<br /></div>
<div class="MsoListParagraphCxSpMiddle" style="margin-left: 2.0cm; mso-add-space: auto; mso-list: l2 level6 lfo1; mso-text-indent-alt: -14.15pt; text-indent: -2.0cm;">
<!--[if !supportLists]--><span style="font-size: 7pt;">
</span>iv.<span style="font-size: 7pt;">
</span><!--[endif]-->Ray Diagrams Showing Image Formation by Reflection in Plane Mirror<o:p></o:p></div>
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<br /></div>
<div class="MsoListParagraphCxSpMiddle" style="margin-left: 2.0cm; mso-add-space: auto;">
<o:p><img src="http://www.saburchill.com/physics/images5/15120205.jpg" /> </o:p></div>
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<img height="224" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgVC8Ncpf6zW5531vhmD3QcV7VUzo0g3t7y8i-0RgXmLKP1mjDLEW7KJ4VcjULXwjrDhBgOMBO4FUzCoDzZO5K-8O3JfQwkZ-CaZFcKWlpEj0aJo_Y_LRCa9OwaEraW893kneQIyHVjjhh0/s320/ray-diagram.jpg" width="320" /></div>
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<v:shape alt="Description: https://encrypted-tbn2.gstatic.com/images?q=tbn:ANd9GcTc5E6nxerGCmLgr77oEm83CZBruVZsommzSN_v5Cl1APlYOH1hLw" id="Picture_x0020_2" o:spid="_x0000_i1025" style="height: 102pt; mso-wrap-style: square; visibility: visible; width: 154.5pt;" type="#_x0000_t75">
<v:imagedata o:title="ANd9GcTc5E6nxerGCmLgr77oEm83CZBruVZsommzSN_v5Cl1APlYOH1hLw" src="file:///C:\Users\choykcc\AppData\Local\Temp\msohtmlclip1\01\clip_image002.jpg">
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MR. Tan (tutortan1@gmail.com)http://www.blogger.com/profile/14597183604923036693noreply@blogger.com0