Foundations Of Physics: Units

Question 1

What is the difference between a quantity and a unit?

Answer 1

A quantity is the amount of something eg mass

A unit is what we measure an amount is eg kilograms

Question 2

What are all the S1 units?

Answer 2

Seconds, metres, kelvin, kilogram, Amps, mole

Question 3

What are the unit prefixes of 
a) mili - m
b) femto- f
c) micro- μ
d) pico- p
e) nano- n
f) kilo - K
g) Giga - G
h) Terra - T
I) centi- c

Answer 3

a) mili - m x10^-3
b) femto- f x10^ -15
c) micro- μ x10^-6
d) pico- p x10^-12
e) nano- n x10^-6
f) kilo - K x10^3
g) Giga - G x10^9
h) Terra - T x10^12
I) centi- c x10^2