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Walker group units of measures

Introduction

SI units

Basic interactions

Dimensions and units

Numeric values of the fundamental constants

Energy Units

Magnetic resonance in SI units

 

Numeric values of the fundamental constants

 National Institute of Standards and Technology http://physics.nist.gov/ 

  Quantity

 Notation/definition  

  Value

  Elementary Charge   e   1.602176462 e-19 [C]
  Speed of light in vacuum   c   2.99792458 e+8 [m/s]
  Planck Constant h   h   6.62606876 e-34 [J s]
= 4.13566727 e-15 [eV s]
  Planck Constant       1.054 571 596 e-34 [J s]
= 6.58211889 e-16 [eV s]
  Permittivity constant of vacuum      8.854187817 e-12 [A s V -1m -1], [ F m -1 ]
  Permeability constant of vacuum      1.256637061435917 e-6 [H m -1]
  = 4π ·10-7 [T m A -1], (exact)  [Wb A -1 m -1], [V s A -1 m -1]
  Proton rest mass   mp   1.67262158 e-27 [kg]
  Neutron rest mass   mn   1.6749286 e-27 kg
  g-factor (Lande factor) - proton   g   5.585 694 675
 proton magnetic moment     1.410606633 e-26 [J T -1]
  Nuclear Magneton - proton   5.05078317 e-27 [J T -1]
  = 3.152451238 e-8 [eV T -1]
  = h 7.62259396 [MHz T -1]
  = h c 2.54262366 e-2 [m-1 T -1]
  = kB 3.6582638 e-4 [K T -1]
  Gyromagnetic ratio
- proton (free)
- proton (H2O)
    2.67522212 e+8 [s-1 T-1]
 2.67488853 e+8 1/(s T)
 2.67515255 e+8 1/(s T)
  Gyromagnetic ratio - proton      42.5774825 [MHz T-1]
  Electron rest mass   me   9.10938188 e-31 [kg]
  Free electron g factor   ge   -2.0023193043737
  Bohr magneton      9.27400899 e-24 [J/T]
  = 5.788 381749 e-5 [eV T -1]
  = h 13.99624624 e+9 [Hz T –1]
  = h c 46.6864521 [m -1 T -1]
  = kB 0.671 7131 [K T -1]
  Free electron magnetic moment,      -9.28476362 e-24[J T-1]
  Free electron gyromagnetic ratio     1.760 859794 e+11 [s -1 T -1]
  Free electron gyromagnetic ratio     28.0249540 [GHz T -1]
  Fine structure constant      7.297352533 e-3 =1/137.03599976
  Gravitational constant   G   6.673 e-11 [N m 2 kg -2 ], [m 3 kg -1 s -2]
 
Bohr Radius
     0.5291772083 e-10 [m] 0.5291772083 [Å]
  Boltzmann constant   k B   1.3806503 e-23 [J / K]
  = 8.617 342 e-5 [eV K –1]
  = h 2.0836644 e+10 [Hz K-1]
  = h c 69.50356 [m-1 K -1]
  Stefan-Boltzmann constant  
  5.670400 e-8 [W m -2 K -4]
  Avogadro's constant
  (number of molecules in a mole)
  N A   6.02214199 e+23 [mol -1]
  Molar Gas Constant   R = NA k B   8.314472 J mol -1 K -1
  Faraday Constant   F = NA e   96 485.3415 [C mol -1]
  Molar Volume, Ideal Gas
  (at 273.15 K, 101 325 Pa)
  Vm   22.413 996 e-3 [m 3 mol -1]
  Molar Volume, Ideal Gas
  (at 273.15 K, 100 Pa)
  Vm   22.710 981 e-3 [m 3 mol -1]
  Standard Acceleration of Gravity    gn   9.80665 m s -2 (exact)

 

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