Measurements

Question 1

What is joule a unit of, and what is the symbol for joule?

Answer 1

Unit of energy.

Symbol: (J)

Question 2

Base SI unit of length?

Answer 2

Meter (m)

Question 3

Base SI unit of mass?

Answer 3

Kilogram (kg)

Question 4

Base SI unit of time?

Answer 4

Seconds (s)

Question 5

Base SI unit of temperature?

Answer 5

kelvin (K)

Question 6

Base SI unit of electric current?

Answer 6

ampere (A)

Question 7

Base SI unit for amount of substance?

Answer 7

Mole (mol)

Question 8

Base SI unit of luminous intensity?

Answer 8

candela (cd)

Question 9

Prefix kilo means

Answer 9

x 10^3

Or x 1000

Question 10

The prefix femto means what factor

Answer 10

10^-15

Question 11

The prefix pico means a factor of

Answer 11

10^-12

Question 12

What is an atomic mass unit (amu) equal to?

Answer 12

1/12 the mass of an unbound atom of Carbon-12.

In grams:
1 amu = 1.66 • 10^-24g

Question 13

1 hertz or 1 Hz means?

Answer 13

1 cycle / second

Question 14

How would you calculate the speed of a wave?

Answer 14

Wavelength x frequency

λ•ν

Question 15

One joule is equal to what in si units?

Answer 15

1kg•m^2/s^2

Question 16

What is Avogadro’s number?

Answer 16

6.0221409 x10^23

Question 17

How many kilograms in a megagram (Mg) also called a Tonne

Answer 17

1000kg

Question 18

What does the prefix nano (n) mean?

Answer 18

Billionth or x10^-9

Question 19

How many nanometers in a metre

Answer 19

1 billion

Question 20

What does the prefix micro (μ) mean?

Answer 20

1 millionth or x10^-6

Question 21

How many micrometers in a meter?

Answer 21

1 million