Learning Prefixes

Question 1

Name the 9 standard prefixes:

If you can’t remember, here’s some help:

T___
G___
M___
K____

M\_\_\_
M\_\_\_
N\_\_\_
P\_\_\_\_
F\_\_\_\_

Answer 1

Tera, T - 1 x 10^12
Giga, G - 1 x 10^9
Mega, M - 1 x 10^6
Kilo, K - 1 x 10^3

Milli, M - 1 x 10^-3
Micro, - 1 x 10^-6
Nano, n - 1 x 10^-9
Pico, p - 1 x 10^-12
Femto, f - 1 x 10^-15

Question 2

What are the 7 bases quantities?

Can you also name their units?

Answer 2

Length, Metres - M

Mass, Kilograms - Kg

Time, Seconds - S

Electric Current, Amps - A

Temperature, Kelvin - K

Amount of substance, Mole - M

Luminous intensity, Candela - Cd

Question 3

Practice Question:

What are the units for Force? [3 marks]

Answer 3

Force = Mass x Acceleration

Mass = Kg
Acceleration = ms^-2

Therefore, based on Homogeneity of Equations (a fancy way of saying BOTH SIDES OF THE EQUATION ARE EQUAL)

Force = Kgms^-2