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Physical Constants (ordered by name)

Constant Name Symbol Quantity (SI Unit) Quantity (cgsUnit)
Aboslute zero 0 K -273.15 oC  
Avogadro's number NA 6.022 x 1023 molecules/mol 6.022 x 1023 molecules/mol
Boltzmann's constant k 1.38x1023 J/atom-K 1.38x10-16 erg/atom-K
8.62x10-5 eV/atom-K
Bohr magneton μB 9.27 x 10-24 A-m2 9.27 X 10-21 erg/gauss
Electron charge e 1.602x10-19 C 4.8x10-10=2 statcoul (in cgs-esu)
Electron mass me 9.109x10-31 kg 9.109x10-28 g
Gas constant R 8.314 J/mol-K 1.987 cal/mol-K
Gravitational constant G 6.674x10-11 N-m2/kg2  
Mass of proton mp 1.672x10-27 kg  
Mass of neutron mn 1.674x10-27 kg  
Permeability of a vacuum μo 1.257x10-6 henry/m unity (in cgs-emu)
Permittivity of a vacuum εo 8.85 x1-12 farad/m unity (in cgs-esu)
Planck's constant h 6.626x10-34 J-s 6.63x10-27 erg-s
4.13x10-15 eV-s
Standard atmospheric pressure 1 atm 1.01325x105 Pa  
Velocity of light in a vacuum c 3 X108 m/s 3 X1010 cm/s
       
       
       
       
       
       
       
       
       
       

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