Constants

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Quantity

Symbol

Value

Angstrom Å 1 [Å] = 10-10 [m]
Atomic mass unit 1.66*10-27 [kg]
Avagodro’s number NAVO 6.02204*1023 [mole-1]
Bohr radius aB 0.52917 [Å]
Boltzmann constant k 1.38066*10-23 [J/K] (R/ NAVO)
Compton wavelength (h/2p )/mec 3.86*10-13 [m]
Elementary charge q 1.60218*10-19 [C]
Electron rest mass m0 9.1095*10-31 [kg]
Electron volt eV 1 [eV] = 1.60218*10-19 [J]
Gravitational Constant G 6.67*10-11 [N*m2/kg2]
Ideal gas constant R 1.98719 [cal/(mole*K)]

8.314 [J/K]

Neutron rest mass mn 1.675*10-27 [kg]
Permeability of vacuum m0 1.25663*10-6 [H/m] (4p *10-7)
Permittivity of vacuum e0 8.85418*10-12 [F/m] (1/m 0c2)
Planck’s constant h 6.62617*10-34 [J*s]
Proton rest mass Mp 1.67264*10-27 [kg]
Speed of light in vacuum 2.99792*108 [m/s]
Thermal voltage @ 300 K kT/q 25.9 [meV]
Pi

(Circle's Circumference/Diameter)

p 3.14159265

358979323 846264338 327950288 419716939 937510582 0974944...

 

Copyright ©2000-2001  Raymond J. Allen

Note:  First few digits of Pi from:  http://www.cacr.caltech.edu/~roy/upi/pi.50000.html