Units Index Science Constants
Constant  Symbol  Value in SI units 
acceleration of free fall  g  9.806 65 m s^{2} 
Avogadro constant  L, LA.  6.0221367(36) x 10^{26}( kgmole)^{1} 
Boltzmann constant  k=R/NA  1.380658(12) x 10^{23} J K^{1} 
Permittivity Of Free Space  e_{0}  8.854187 817 x 10^{12} F m^{1} 
electronic charge  e  1.602 177 33 (49) x 10^{19} C 
electronic rest mass  m_{e}  9.1093897(54) x 10^{31} kg 
Faraday constant  F  9.648 5309(29) x 10^{7} C( kgmole)^{1} 
gas constant  R.  8.314 510(70) x 10^{3 }J K^{1 }( kgmole)^{1 } 
gravitational constant  G  6.672 59(85) x 10^{11} m^{3} kg^{1} s^{2} 
Loschmidt’s Number  NL  2.686 763(23) x 10^{25} m^{3} 
magnetic constant  m_{0}  4 x (pi) x 10^{7} H m^{1} 
neutron rest mass  m_{n}  1.674 9286(10) x 10^{27} kg 
Planck constant  h  6.626 0755(40) x 10^{34} J s 
proton rest mass  m_{p}  1.672 6231(10) x 10^{27} kg 
speed of light  c  2.997 924 58 x 10^{8} m s^{1} 
StefanBoltzmann constant  s  5.670 51(19)� 10^{8} W m^{2} K^{4} 

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