S c Speed of light in vacuo 2.998 × 108m s−1 e Elementary charge 1.602 × 10−19 C mn Neutron rest mass 1.675 × 10−27 kg mp Proton rest mass 1.673 × 10−27 kg me Electron rest mass 9.110 × 10−31 kg h Planck’s constant 6.626 × 10−34 J s h¯ Dirac’s constant (= h/2π) 1.055 × 10−34 J s k Boltzmann’s constant 1.381 × 10−23 J K−1 G Gravitational constant 6.673 × 10−11 N m2 kg−2 σ Stefan-Boltzmann constant 5.670 × 10−8 J m−2 K−4 s −1 c1 First Radiation Constant (= 2πhc2 ) 3.742 × 10−16 J m2 s −1 c2 Second Radiation Constant (= hc/k) 1.439 × 10−2 m K εo Permittivity of free space 8.854 × 10−12 C 2 N−1 m−2 µo Permeability of free scpae 4π × 10−7 H m−1 NA Avogadro constant 6.022 ×1023 mol−1 R Gas constant 8.314 J K−1 mol−1 a0 Bohr radius 5.292 ×10−11 m µB Bohr magneton 9.274 ×10−24 J T−1 α Fine structure constant (= 1/137.0) 7.297 ×10−3 M Solar Mass 1.989 ×1030 kg R Solar radius 6.96 ×108 m L Solar luminosity 3.827 ×1026 J s−1 M⊕ Earth Mass 5.976 ×1024 kg R⊕ Mean earth radius 6.371 ×106 m 1 light year 9.461 ×1015 m 1 AU Astronomical Unit 1.496 ×1011 m 1 pc Parsec 3.086 ×1016 m 1 year 3.156 ×107 s ENERGY CONVERSION : 1 joule (J) = 6.2415 × 1018 electronvolts (eV) 3
Posted on: Sun, 05 Oct 2014 22:20:13 +0000
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