SI Units

Question 1

What is the SI Unit for length?

Answer 1

meters (m)

Question 2

What is the SI Unit for mass?

Answer 2

kilograms (kg)

Question 3

What is the SI Unit for time?

Answer 3

seconds (s)

Question 4

What is the SI Unit for electric current?

Answer 4

amperes (A)

Question 5

What is the SI Unit for temperature?

Answer 5

kelvin (k)

Question 6

What is the SI Unit for luminous intensity? (How bright is the light source?)

Answer 6

candela (cd)

Question 7

What is the SI Unit for the amount of a substance?

Answer 7

moles (mol)

Question 8

How many atoms or molecules are in one mole of a substance?

Answer 8

Avogadro’s Number = 6.022E23

Question 9

What is the SI Unit for frequency?

Answer 9

hertz (Hz) which denotes cycles per second

Question 10

What is the SI Unit for pressure?

Answer 10

the pascal (Pa)

Question 11

What is the SI Unit for energy? (Such as thermal energy or work)

Answer 11

joules (J)

Question 12

What is the SI Unit for volume?

Answer 12

liter (L)

Question 13

What is the SI Unit for electric charge?

Answer 13

Coulombs (C)

Question 14

What are the derived SI units for force?

Answer 14

Kg · m/s²

These SI units comprise the Newton (N)

F = ma

where:

m = Kg
a = m/s²

Question 15

What are the derived SI units for thermal energy?

Answer 15

Kg · m²/s²

These SI units comprise the Joule (J)

Question 16

What are the derived SI units for power?

Answer 16

Kg · m²/s³

These SI units comprise the watt (W)

Question 17

What are the derfived SI units for voltage?

Answer 17

Kg · m²/s³ · A

These SI units comprise the volt (V)

Question 18

What are the derived SI units for charge?

Answer 18

A · s

Amperes multiplied by time in seconds defines the Coulomb (C)