Physics Constants
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Physics Constants
NameSymbolValueUnit
atomic mass unitamu1.6605 x10-27kg
Avogadro's NumberNA6.022 x 1023mol-1
Bohr magnetonµB9.274 x10-24J T-1
Boltzmann constantk1.3807 x10-23J K-1
Conductance quantumG07.7481 x10-5S
earths gravityg9.806m s-2
electron chargee1.602 x 10-19C
electron massme9.1094 x10-31kg
electron volteV1.6022 x10-19J
Faraday constantF9.6485 x 104C mol-1
fine structure constantα7.2974 x10-3 
gas constantR8.314J K-2 mol-1
Gravitational constantG6.67 x10-11N m2 Kg-2
Hartree energyEH4.3597 x10-18J
Josephson constantKJ4.8360 x1014Hz V-1
light yearly9.4605 x1015m
Loschmidt constantno2.6868 x1025m-3
magnetic flux quantumΦ2.0678 x10-15W
natural logarithmic basee12.7183 
neutron massmn1.6749 x10-27kg
nuclear magnetonµN5.0508 x 10-27J T-1
permeability of free spaceµ04π x 10-7H m-1
permittivity of free spaceεo8.854 x 10-12F m-1
piπ3.141592654 
Planck constanth6.626 x 10-34J s
proton massmp1.6726 x10-27kg
Rydberg constantR1.0974 x 107m-1
speed of lightc2.998 x 108m s-1
Stefan-Boltzmann constantσ5.6704 x10-8W m-2 K-4
von Klitzing constantRK2.5813 x104Ω
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