Physical constants

Name:

Symbol:

Value:

Unit:

Atomic Mass Unit

mu

1,6605402·10-27

Kg

Avogadros constant

NA el. L

6,0221415(10)·1023

mol-1

Bohr radius

a0

0,5291772108·10-10

m

Boltzmanns constant

k

1,380658·10-23

J/K

Coulombs constant

kc

8,98755·10-9

Nm2/C2

The electrons mass

me

9,1093898·10-31

Kg

Elementary charge

e

1,60217733·10-19

C

Faradays constant

F’

9,6485309·104

C/mol

Gas constant

R

8,31451
eller 0,0821

J/(mol·K)
L·atm/(mol·K)

Gravitational constant

G

6,6726·10-11

N·m2/Kg2

Speed og light in vacuum

c

2,99792458·108

m/s

The neutrons mass

mn

1,674954·10-27

Kg

Normal pressure

p0

101,325

kPa

Normal gravitational acceleration

gn

9,80665

m/s2

Vacuum permeability

µ0

4π10-7

H/m

Vacuum permittivity

ε0

8,8541878·10-12

F/m

Plancks constant

h

6,626076·10-34

J·s

The protons mass

mp

1,6726231·10-27

Kg

Rydberg constant

R

1,0973732·107

m-1

Stefans constant

σ

5,67051·10-8

W/(m2·K4)

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