Physics Study Guide/Physics constants

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Contents

Commonly Used Physical ConstantsEdit

Uncertainty should be read as 1.234(56) = 1.234 0.056
Name Symbol Value Units Relative Uncertainty
Speed of light (in vacuum)       (exact)
Magnetic Constant       (exact)
Electric Constant       (exact)
Newtonian Gravitaional Constant        
Plank's Constant        
Elementary charge        
Mass of the electron        
Mass of the proton        
Fine structure constant     dimensionless  
Molar gass constant        
Boltzman's constant        
Avogadro's Number        
Rydberg constant        
Standard acceleration of gravity       defined
Atmospheric pressure       defined
Bohr Radius        
Electron Volt        

To Be Merged Into TableEdit

This list is prepared in the format

  • Constant (symbol) : value

  • Coulomb's Law Constant (k) : 1/(4 π ε0) = 9.0 × 109 N·m2/C2
  • Faraday constant (F)  : 96,485 C·mol−1
  • Mass of a neutron (mn) : 1.67495 × 10−27 kg
  • Mass of Earth : 5.98 × 1024 kg
  • Mass of the Moon : 7.35 × 1022 kg
  • Mean radius of Earth : 6.37 × 106 m
  • Mean radius of the Moon : 1.74 × 106 m
  • Dirac's Constant ( ) :   = 1.05457148 × 10−34 J·s
  • Speed of sound in air at STP : 3.31 × 102 m/s
  • Unified Atomic Mass Unit (u) : 1.66 × 10−27 kg
Item Proton Neutron Electron
Mass 1 1 Negligible
Charge +1 0 -1

See AlsoEdit