Physical Constants

Planck constant $\displaystyle :$	$\displaystyle h$	$\displaystyle =6.62606957\times 10^{-34} {\rm J s}$
Reduced Planck constant $\displaystyle :$	$\displaystyle \hbar$	$\displaystyle =h/(2\pi)=1.05457173\times 10^{-34} {\rm J s}$
Electron mass $\displaystyle :$	$\displaystyle m_e$	$\displaystyle =9.10938291\times 10^{-31} {\rm kg}$
Electron charge (magnitude) $\displaystyle :$	$\displaystyle e$	$\displaystyle =1.60217657 \times 10^{-19} {\rm C}$
Proton mass $\displaystyle :$	$\displaystyle m_p$	$\displaystyle =1.67262178\times 10^{-27} {\rm kg}$
Electric permittivity of free space $\displaystyle :$	$\displaystyle \epsilon_0$	$\displaystyle = 8.85418782\times 10^{-12} {\rm F} {\rm m}^{ -1}$
Magnetic permeability of free space $\displaystyle :$	$\displaystyle \mu_0$	$\displaystyle = 4\pi\times 10^{-7} {\rm H} {\rm m}^{ -1}$
Speed of light in vacuum $\displaystyle :$	$\displaystyle c$	$\displaystyle =2.99792458 \times 10^{ 8} {\rm m s}^{-1}$
Bohr magneton $\displaystyle :$	$\displaystyle \mu_B$	$\displaystyle =9.27400968\times 10^{-24} {\rm J T^{-1}}$
Molar ideal gas constant $\displaystyle :$	$\displaystyle R$	$\displaystyle =8.3144621 {\rm J K}^{ -1}$
Boltzmann constant $\displaystyle :$	$\displaystyle k$	$\displaystyle =1.3806488\times{10}^{-23} {\rm J K}^{ -1}$
Avogadro number $\displaystyle :$	$\displaystyle N_A$	$\displaystyle =R/k=6.0221409\times{10}^{ 23}$
Absolute zero $\displaystyle :$	$\displaystyle T_0$	$\displaystyle =273.15^\circ {\rm C}$
Stefan-Boltzmann constant $\displaystyle :$	$\displaystyle \sigma$	$\displaystyle =5.670367\times 10^{-8} {\rm W} {\rm m}^{-2} {\rm K}^{-4}$
Gravitational constant $\displaystyle :$	$\displaystyle G$	$\displaystyle =6.67408\times 10^{-11} {\rm m}^{ 3} {\rm kg}^{-1} {\rm s}^{-2}$