Chapter 2- Foundations Of Physics

Question 1

What are the SI units for:
Length
Mass
Time 
Electric current
Temperature
Amount of a substance

Answer 1

Length - metre
Mass - kilogram
Time - second 
Electric current - amps
Temperature - kelvin
Amount of a substance - moles

Question 2

What is the prefix symbol and factor (power) for:

1) milli
2) giga
3) nano
4) pico
5) tera
6) mega
7) centi
8) deci
9) kilo
10) micro

Answer 2

1) m, 10^-3
2) G, 10^9
3) n, 10^-9
4) p, 10^-12
5) T, 10^12
6) M, 10^6
7) c, 10^-2
8) d, 10^-1
9) k, 10^3
10) u (mu), 10^-6

Question 3

Define: scalar quantity

Answer 3

Quantity with magnitude but no direction

Question 4

Define: Vector quantity

Answer 4

Quantity with both magnitude and direction