Spark image

Fundamental constants

The following table gives the values of the majority of fundamental constants needed in a school Physics course. The units for each are given together with the symbol for some.

Avogadro mass unit   932 MeV or 1.66x10-27 kg
Avogadro's number   6.02x1023 mol-1
Boltzmann's constant   1.38x10-23 JK-1
Electron charge   1.602x10-19 C
Electron mass   9.11x10-31 kg or 0.000 549 u
Energy conversions   1 u = 1.66x10-27 kg = 1.492x10-10 J = 931 MeV
Mass of alpha particle   4.001 506 u
Mass of helium atom   4.002 603 u
Mass of proton   1.007 276 u
Mass of neutron   1.008 665 u
Mass of hydrogen (1H) atom   1.007 825 u
Mean value of go for the Earth   9.81 ms-2
Molar gas constant   8.31 mol-1K-1
Permeability of free space (mo)   4px10-7 Hm-1
Permittivity of free space (eo)   8.85x10-12 Fm-1
Planck's constant (h)   6.63x10-34 Js
Specific charge of the electron (e/m)   1.76x1011 Ckg-1
Speed of electromagnetic radiation in free space   2.997 925x108 ms-1
Stefan's constant (s)   5.7x10-8 Wm2K-4
Universal constant of gravitation (G)   6.67x10-11 Nm2kg-2
© Keith Gibbs 2011