Physical Constants
speed of light, c = 3.00 x 108 m s-1
permeability of free space, μ0 = 4π x 10-7 H m-1
permittivty of free space, ε0 = 8.85 x 10-12 F m-1
charge of electron, e = 1.60 x 10-19 C
Planck constant, h = 6.63 x 10-34 J s
atomic mass unit, u = 1.66 x 10-27 kg
mass of electron, me = 9.11 x 10-31 kg
mass of proton, mp = 1.67 x 10-27 kg
gas constant, R = 8.31 J K-1 mol-1
the Boltzmann constant, k = 1.38 x 10-23 J K-1
the Avogadro constant, NA = 6.02 x 1023
gravitational constant, G = 6.67 x 10-11 N m2 kg-2
acceleration of free fall, g = 9.81 m s-2
Last updated: 1 October 2010.