Physical Quantities 1.1

Question 1

List prefixes in order, with symbol and size

Answer 1

Tera /T /10^12
Giga /G /10^9
Mega /M /10^6
Kilo /k /10^3
Milli /m /10^-3
Micro / (m)u /10^-6
Nano / n / 10^-9
Pick / p / 10^-12
Femto / f / 10^-15

Centi/ c / 10^-2

Question 2

Put 1,213 mA into kA and in standard form

Answer 2

1,213 x10^-3 A
1.213 x10^0 A
0.00123 kA
1.213 x10^-3 kA

Question 3

List the 6 base units

Answer 3

Metre m
Kilogram kg
Second s
Ampere A
Mole mol
Kelvin K

Question 4

State the derived units for energy and the equation used to find them

Answer 4

kg m^2 s^-2
KE = 1/2mv^2

Question 5

Derived unit for Newton and equation to find it

Answer 5

kg m s^-2
Fr = ma

Question 6

Derived units for momentum and equation used

Answer 6

kg m s^-1
p=mv

Question 7

Derived units for moment and equation used to find them

Answer 7

kg m^2 s^-2
M = fd (L)

Question 8

Derived units for Resistance and equation

Answer 8

kg m^2 s^-3 A^-2
P = I^2 x R

Question 9

Derived units for charge and equation

Answer 9

A s
Q = It

Question 10

Derived units for frequency and equation

Answer 10

s^-1
f = 1/s

Question 11

Derived units for pressure and equation used

Answer 11

kg m^-1 s^-2
p = f/A

Question 12

Derived units for the volt and equation used

Answer 12

kg m^2 s^-3 A^-1
P = IV

Question 13

Derived units for power and the equation used

Answer 13

kg m^2 s^-3
P = E/t

Question 14

What does it mean if an equation is homogeneous?

Answer 14

The units on both sides are the same

Question 15

State what is meant by a derived quantity

Answer 15

A quantity that is a combination of 2 or more base units

Question 16

State 2 things all physical quantities have

Answer 16

Magnitude
Unit