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Reference Tables -- Fundamental Physical Constants

 

Fundamental Physical Constants
Engineering, Physics, Astronomy, Chemistry etc.
Constant Value Units Definition
Astronomical Unit AU
1.495 978 7 e11
m
Mean Sun-Earth distance
Alpha
7.297 352 81 e-03
µ0 c e2/h
Fine Structure Constant
AMU Chemical
1.660 260 00 e-27
kg
1/16 of the weighted average mass of the 3 naturally occuring neutral isotopes of oxygen.
AMU Physical
1.659 810 00 e-27
kg
1/16 of the mass of a neutral oxygen 16 atom.
Atomic Mass Unit
1.660 540 2 e-27
kg
Atomic mass unit (defined to be 1/12 of the mass of carbon 12)
Avogadro Number NA
6.022 136 7 e23
particles/mol
Number of particles in 1 mole of substance
Bohr Radius a0
5.291 772 1 e-11
alpha/pi R
Boltzman Constant k
1.380 658 e-23
J/K
Boltzmann constant
Coulomb Constant
6.954 063 e-12
pi epsilon0
Listed as "k" sometimes
Dalton
1.660 540 2 e-27
µ
Electron Rest Mass me
9.109 389 7 e-31
kg
Particle mass
Proton Rest Mass mp
1.672 623 1 e-27
kg
Particle mass
Neutron Rest Mass mn
1.674 928 6 e-27
kg
Particle mass
Muon Rest Mass mm
1.883 532 7 e-28
kg
Particle mass
Deuteron Rest Mass md
3.343 586 e-27
kg
Particle mass
Electron rest energy mec2
8.187 111 2 e-14
J
Elementary Charge e
1.602 177 3 e-19
C
Elementary charge
Electron Charge-Mass ratio e/me
1.758 819 6 e11
C/kg
Energy
8.987 551 8 e16
c2
Convert mass to energy
Faraday Constant F
9.648 46 e4
NA e
Fine Structure Constant (alpha)
7.297 352 81 e-3
µ0 c e2/h
Fine Structure Constant
Gravitational Constant
6.687 3 e-11
N m2/kg2
Newtonian gravity constant
Gas Constant R
8.314 51
J/mol K
Molar gas constant
Hartree
2.625 501 e6
J/mol
Atomic energy unit =  e2/(4 pi epsilon0a0)
Light Speed
2.997 924 58 e8
m/s
Molar Volume
2.241 41 e-2
m3/kmol
Volume occupied by one mole of an ideal gas at standard temperatureand pressure.
Mole
1.0
mol
Amount of substance of a system which contains as many elementary entities as atoms in 0.012 kg of unbound carbon 12 atoms, at rest and in the ground state.
PI
3.141 592 7
pi
Permeability of vacuum µ0
1.256 637 06 e-6
T2 m2/J
Permittivity of vacuum (epsilon0)
8.854 187 817 e-12
C2/Jm
Permittivity of vacuum, epsilon0 = 1/(µ0c2) (exact)
Planck Constant h
6.626 075 5 e-34
J s
Action of one joule over one second
Prout
2.972 04 e-14
keV
Nuclear binding energy equal to 1/12 binding energy of the deuteron
Rydberg Constant R
1.097 373 2 e7
/m
Speed of Light c
2.997 924 58 e8
m/s
Speed of light in a vacuum(exact)
Standard Temperature
2.731 5 e2
K
Standard temperature
Unified Mass Unit
1.660 43 e-27
kg

 


 

 

 

 

 

 

 

 

 

 

 


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