physical constants

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physical constants

Universal constant

Symbol

Value

Unit

speed of light in vacuum

c

299,792,458

108 ms−1

permeability of vacuum

μ0

12.566370614

10−7 NA−2

permittivity of vacuum

ε0

8.854187817

10−12 Fm−1

Newtonian constant of gravitation

G

6.67259

10−11 m3 kg−1 s−2

Planck constant

h

6.6260755

10−34 Js

Electromagnetic constants

elementary charge

e

1.60217733

10−19 C

Electron

electron mass

me

9.1093897

10−31 kg

electron specific charge

−e/me

−1.75881962

1011 C kg−1

Muon, proton and neutron

muon mass

mm

1.8825327

10−28 kg

proton mass

mp

1.6726231

10−27 kg

neutron mass

mn

1.6749286

10−27 kg

Physico-chemical constants

Avogadro constant

NA, L

6.0221367

1023 mol−1

atomic mass constant

μ

1.6605402

10−27 kg

Faraday constant

F

96,485.309

104 C mol−1

molar gas constant

R

8.314510

100 J mol−1 K−1

Boltzmann constant

k

1.380658

10−23 JK−1


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physical constants

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