Physical Constants
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admin
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August 15, 2014
speed of light in a vacuum
c
2.97 924 58×108 m s-1 (by definition)
permeability of a vacuum
µ0
4π 10-7 H m-1 (by denition)
permittivity of a vacuum
ε0
1/^µc² = 8.854 187 817…×10-12 F m-1
elementary charge
e
1.602 177 33(49)×10-19 C
Planck constant
h
6.26 075 5(40)×10-34 Js
h/2π
h
1.054 572 66(63)×10-34 Js
Avogadro constant
NA
6.22 136 7(36)×1023 mol-1
unified atomic mass constant
mu
1.60 540 2(10)×10-27 kg
mass of electron
me
9.09 389 7(54)×10-31 kg
mass of proton
mp
1.672 623 1(10)×10-27 kg
Bohr magneton eh=4πme
µB
9.74 015 4(31)×10-24 J T-1
molar gas constant
R
8.314 510(70) JK-1 mol-1
Boltzmann constant
kB
1.80 658(12)×10-23 J K-1
StefanĀBoltzmann constant
ρ
5.670 51(19)×10-8 W m-2 K-4
gravitational constant
G
6.72 59(85)×10-11 N m2 kg-2
acceleration of free fall
g
9.806 65 m s-2 (standard value at sea level)
