Constants and Prefixes

Question 1

What is

G ?

Universal Gravitational Constant

Answer 1

6.67 x 10^-11

Question 2

What is

h ?

Planck’s constant

Answer 2

6.63 x 10^-34 Js

Joule Second

Question 3

What is

Me

Mass of an electron

Answer 3

9.1 x 10^-31 Kg

Question 4

What is

g

Acceleration due to gravity on the Earth’s Surface

Answer 4

9.81 m/s²

Question 5

What is the value of

k

In Electric Field

Answer 5

9.0 x 10⁹

Question 6

What is the formula for

k

In Electric Field

Answer 6

1/(4πε₀)

Question 7

What is

ε₀

Permittivity of free space

Answer 7

8.85 x 10^-12

Question 8

What is

0 °C in Kelvin Temperature?

Answer 8

273.15 K

Question 9

What is

e ?

The charge on an electron

Answer 9

(-) 1.6 x 10^-19 C

C is coulombs

Question 10

What is

1 u ?

Atomic Mass Unit

Answer 10

1.67 x 10^-27 Kg

Question 11

What is

c ?

The speed of EM radiation in vacuum (or air)

Answer 11

3 x 10⁸ m/s

Question 12

What is

1 eV ?

electron-volt

Answer 12

1.6 x 10^-19 J

J is Joules

Question 13

What is

Na ?

Avogadro’s Number

Answer 13

6.02 x 10²³ moles

Question 14

What is

R

Molar Gas Constant

Answer 14

1. 8.31 J/molK
2. 0.082 dm^3atm/molK

when using 1. the value of volume is metre cubed, when using 2. the value of volume is decimetre cubed.

Question 15

What is the value of

mili

Answer 15

10^-3

Question 16

What is the value of

micro

Answer 16

10^-6

Question 17

What is the value of

nano

Answer 17

10^-9

Question 18

What is the value of

pico

Answer 18

10^-12