A)

__Base Quantity and Derived Quantity__
1.
What is a base quantity? Name 5 base quantities.

2.
Define derived quantity. And, state 5 derived
quantities.

3.
State two main advantages of standardisation of all
units of measurement for physical quantities.

4.
Give the name and symbol of the SI unit of measurement
for each of the following physical quantities:

a.
Length

b.
Mass

c.
Time

d.
Temperature

e.
Current

f.
Force

g.
Energy

h.
Power

5.
Some derived quantities have been given special names
by SI (

**). State these derived quantities (that you know of) and their special names.***International System of Units*
B)

__Standard Form / Scientific Notation / Prefixes__
6.
Express each the following physical quantities in its
SI unit and in scientific notation to 3 significant figures:

a.
Acceleration due to gravity, g = 9.783 ms

^{-2}
b.
Speed of light in vacuum, c = 298,000 kms

^{-1}
c.
Length of an onion cell, L = 0.000 028 m

d.
Charge of an electron = -1.6 x 10

^{-7}pC (pico coulombs)
7.
For each of the following symbol of prefixes, state its
name and its numerical value in index form (i.e. in power or exponential form):

a.
da

b.
h

c.
k

d.
M

e.
G

f.
T

g.
d

h.
c

i.
m

j.
µ

k.
n

l.
p

8.
Identify the largest and the smallest measurements from
the following values:

A.
3.14 x 10

^{3}km
B.
3.14 x 10

^{8}nm
C.
3.14 x 10

^{10}µm
D.
3.14 x 10

^{-2}cm
9.
Convert:

a.
Density of sea water from 1.05 x 10

^{3}kg m^{-3}to g cm^{-3}
b.
Velocity of cyclist from 5.6 m s

^{-1}to km h^{-1}
c.
Radio frequency from 102.3 MHz to Hz

d.
470 pF to F in standard form to 3 significant figures

e.
0.0006 Gm to Mm

f.
26 µm to mm

C)

__Scalar Quantity and Vector Quantity__
10.
State the main difference between a scalar quantity and
a vector quantity.

11.
An object moves 40 km on a bearing of 090o from O to A in
20 minutes; it then immediately moves north 30 km also in 20 minutes to B. Find:

a.
The total distance travelled by the object from O to B

b.
The final displacement of the object in moving from O
to B in terms of both magnitude and bearing from O.

c.
For the whole journey from O to B:

i.
The object’s average speed

ii.
The object’s average velocity

12.
Is pressure a scalar or vector quantity? Name 5 scalar
quantities.

13.
Name 5 vector quantities and state their respective SI units
of measurement.

D)

__Measurements in Science__
14.
All measurements
in science are Man’s attempts to make an acceptable estimate of the true and
actual value of a physical quantity – True or False?

15.
The difference between the true and actual value of a
physical quantity and the value obtained in a measurement is known as
________________.

16.
There are two main types of errors. State them,
describe their differences and how each type of error may be minimised or
avoided – give examples where appropriate.

17.
Attempts the following past year SPM questions:

a.

**2007 P1 Q3 pg. 92 -**Which balance is more sensitive?
b.

**2011 P1 Q2 at pg. 280**on sensitivity in measurement
c.

**2005 P1 Q2 Pg 3**on consistency and precision in measurement
d.

**2008 P1 Q2 Pg. 140**– consistency and precision
e.

**2011 P1 Q1 at pg. 280**– on use of vernier calipers
f.

**2005 Paper 1 Q1 at Pg 3**– on use of micrometer srew gauge
g.

**2010 Paper 2 Q1 at Pg. 246**– on use of stopwatch to measure 20 oscillations of pendulum
h.

**2005 P2 Q1 Pg. 16**– on use of ammeter, anti-parallax mirror, etc.------------------------------------------------------------------------------------

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## 5 comments:

This helped a little bit but not a lot because I'm in chemistry

You can't learn much chemistry in physics blog...obviously.

OMG........

no ans for the exercises?

Have you joined as member of this blog?

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