1. Key Concepts of Physics

Question 1

What unit measures length?

Answer 1

metres, m

Question 2

What unit measures mass?

Answer 2

kilogram, kg

Question 3

What unit measures time?

Answer 3

seconds, s

Question 4

What unit measures current?

Answer 4

amps, A

Question 5

What unit measures temperature?

Answer 5

Kelvin, K

Question 6

What unit measures the amount of substance?

Answer 6

moles, mol

Question 7

What unit measures voltage?

Answer 7

volts, V

Question 8

What unit measures frequency?

Answer 8

hertz, Hz

Question 9

What unit measures force?

Answer 9

newton, N

Question 10

What unit measures energy?

Answer 10

joule, J

Question 11

What unit measures power?

Answer 11

watt, W

Question 12

What unit measures pressure?

Answer 12

pascal, Pa

Question 13

What unit measures charge?

Answer 13

coulomb, C

Question 14

What unit measures resistance?

Answer 14

ohm, Ω

Question 15

What unit measures magnetic flux density?

Answer 15

tesla, T

Question 16

Symbol for prefix, giga

Answer 16

G

Question 17

Size of one giga

Answer 17

x 10⁹
(1 billion)

Question 18

Symbol for prefix, mega

Answer 18

M

Question 19

Size of one mega

Answer 19

x 10⁶
(1 million)

Question 20

Symbol for prefix, kilo

Answer 20

k

Question 21

Size of one kilo

Answer 21

x 10³
(1 thousand)

Question 22

Symbol for prefix, centi

Answer 22

c

Question 23

Size of one centi

Answer 23

x 10⁻²
(1 hundredth)

Question 24

Symbol for prefix, mili

Answer 24

m

Question 25

Size of one mili

Answer 25

x 10⁻³
(1 thousandth)

Question 26

Symbol for prefix, micro

Answer 26

µ

Question 27

Size of one micro

Answer 27

x 10⁻⁶
(1 millionth)

Question 28

Symbol for prefix, nano

Answer 28

n

Question 29

Size of one nano

Answer 29

x 10⁻⁹
(1 billionth)