---------- *MATH, PHYSCIAL, & AND ENGINEERING CONSTANTS* ---------- pi 3.14159265358979 e 2.718281828459045 1/sqrt(2*pi) 0.3989422804014326779 loge(2) 0.6931471805599453094 loge(3) 1.098612288668109691395 sqrt(2) 1.4142135623730950488 sqrt(3) 1.7320508075688772935 gamma 0.5772156649015328606 gamma(0.5) 1.772453850905516 Speed of light in vacuum 2.997925 Elementary charge 1.60210 Elementary charge 4.80298 Avogadro constant 6.02252 Electron rest mass 9.1091 Electron rest mass 5.48597 Proton rest mass 1.67252 Proton rest mass 1.00727663 Neutron rest mass 1.67482 Neutron rest mass 1.0086654 Faraday constant 9.64870 Faraday constant 2.89261 Planck constant 6.6256 Planck constant 1.05450 Fine structure constant 7.29720 Fine structure constant 1.370388 Fine structure constant 1.161385 Fine structure constant 5.32492 Charge-to-mass ratio for electron 1.758796 Charge-to-mass ratio for electron 5.27274 Quantum-charge ratio 4.13556 Quantum charge ratio 1.37947 Compton wavelength of electron 2.42621 Compton wavelength of electron 3.86144 Compton wavelength of proton 1.32140 Compton wavelength of proton 2.10307 Rydberg constant 1.0973731 Bohr radius 5.29167 Electron radius 2.81777 Electron radius 7.9398 Thomson cross section 6.6516 Gyromagnetic ratio of proton 2.67519 Gyromagnetic ratio of proton 4.25770 Bohr magneton 9.2732 Nuclear magneton 5.0505 Proton moment 1.41049 Anomalous electron moment corrn. 1.159615 Zeeman splitting constant 4.66858 Gas constant 8.3143 Normal volume perfect gas 2.24136 Boltzmann constant 1.38054 First radiation constant 3.7405 Second radiation constant 1.43879 Wien displacement constant 2.8978 Stefan-Boltzmann constant 5.6697 Gravitational constant 6.670 Source--Abramowitz & Stegun (1964). Handbook of Mathematical Functions. National Bureau of Standards Applied Mathematics Series Vol. 55. U. S. Gov. Printing Office, Washington, D. C., Page 7.