C1

Question 1

Name all the multiples and their symbols

Answer 1

10¹² - tera, T
10⁹ - giga, G
10⁶ - mega, M
10³ - kilo, k

Question 2

Name all the sub-multiples and their symbols

Answer 2

10^-¹- deci, d
10^-² - centi, c
10^-³ - milli, m
10^-⁶ - micro, μ
10^-⁹ - nano, n

Question 3

Standard form of 0.01nm in m

Answer 3

0.01 = 1x10^²
0.01nm= 0.01 x 10^–⁹m = 1 x 10-² x 10-⁹m = 1 x 10-¹¹m

Question 4

Standard form rules

Answer 4

• ranging from 1.00 ~ 10.00
• 3 dp
• eg 1.00 x 10

Question 5

what is the SI unit of mass, Kg or kg?

Answer 5

kg, the K in Kg is Kelvin

Question 6

Instrument for time

Answer 6

Stop watch

Question 7

1) instrument for measuring length
2) precision
3) range

Answer 7

1) measuring tape (steel/cloth), metre rule, digital caliber, digital micrometer
2) measuring tape (1mm), metre rule(1mm), digital caliper (0.01 mm), digital micrometer screw gauge ( 0.001mm)
3) measuring tape ( zero to several metres), metre rule ( zero ~ 1 metre), digital caliper (0~15cm), digital micrometer screw gauge( 0~2.5cm)

cloth measuring tape -> curved surfaces
DMSG -> wire
calipers -> test tube
metre rule -> table

Question 8

Why is it not recommended to put the object at the zero mark when measuring

Answer 8

Avoid using the zero mark of the metre rule as a start point to take measurements. This is because wear and tear may make it unsuitable for
measuring purposes. The worn end may introduce errors to the readings.

Question 9

Types of errors + describe

Answer 9

1) systematic error— a type of systematic error is zero error( imperfect alignment of zero marks), due to instrument
2)random error — example is human reaction time, parallax error

parallax error — when eye level is not perpendicular to reading (type of random error)
systematic -> cannot change/ be controlled

Question 10

Parts of digital caliper + how to use

Answer 10

1) outside jaws - for measuring

Question 11

Parts of digital micrometer screw gauge + how to use

Answer 11

1)

Question 12

what is the pendulum proportionate to and independent of

Answer 12

time of period is proportionate to length of bob
it is independent of mass of bob

Question 13

what are the 7 base quantities

Answer 13

length, mass , time, thermodynamic temperature, electric current, amount of substance

Question 14

sizes of these common objects:
diameter of earth
height of tall mountain
length of football field
height of chair
width of paper
diameter of wire
size of human cell
size of large molecule

Answer 14

10^7
10^3
10^2
10^-1
10^-3
10^-4
10^-6
10^-9

Question 15

what is a
1) oscillation in a pendulum
2) period

Answer 15

1. from SP to EP same position
2. time taken for one complete oscillation

Question 16

scalar vs vector

Answer 16

scalar
- magnitude
- distance, speed, mass, energy, time

vector
- magnitude + direction
- displacement, velocity, acceleration, force, weight

Question 17

precautions in pendulum experiment

Answer 17

ensure that string is taut when measuring

Question 18

conversion

Answer 18

B X S
S ÷ B