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Constants



Universal constants in Physics

ConstantSymbolValue
Gravitational accelerationg9.81 m s-2
Gravatational ConstantG6.673 x 10-11Nm2kg-2
Avogadro's numberNA6.023 x 1023mol-1
Water triple pointTwater273.15K
Ideal gas constantR8.314JK-1mol-1
torrtorr133.32Pa
Boltzmann's Constantk1.381 x 10-23JK-1
Stefan's Constantσ5.670 x 10-8Wm-2K-4
Rydberg's Constant Rhc1.097 x 107m-1
Planck's Constanth6.626 x 10-34Js
Light velocity(vacuum)c2.998 x 108ms-1
Proton's chargee1.602 x 10-19C
Electron's chargeme9.109 x 10-31kg
Masse atomic Unitu1.66 x 10-27kg
Electrical's Constantε08.854 x 10-12Fm-1
Magnetic's Constantμ04π x 10-7Hm-1
Bohr's Constant μB9.274 x 10-24Am2
Nuclear MagnetonμN5.051 x 10-27Am2
Fine structure constant α7.297 x 10-3
Electronic wavelengthλc2.426 x 10-12m
Bohr's radius a05.2918 x 10-11m
AngstromǺ10-10m
barnb10-28m2
  
 



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