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Table of Constants

Constant Symbol Approximate Value Units
Speed of light [math]\displaystyle{ c }[/math] [math]\displaystyle{ 3 \times 10^8 }[/math] [math]\displaystyle{ m/s }[/math]
Gravitational Constant [math]\displaystyle{ G }[/math] [math]\displaystyle{ 6.7 \times 10^{-11} }[/math] [math]\displaystyle{ N \cdot m^2 / kg^2 }[/math]
Electron Mass [math]\displaystyle{ m_e }[/math] [math]\displaystyle{ 9 \times 10^{-31} }[/math] [math]\displaystyle{ kg }[/math]
Proton Mass [math]\displaystyle{ m_p }[/math] [math]\displaystyle{ 1.7 \times 10^{-27} }[/math] [math]\displaystyle{ kg }[/math]
Neutron Mass [math]\displaystyle{ m_n }[/math] [math]\displaystyle{ 1.7 \times 10^{-27} }[/math] [math]\displaystyle{ kg }[/math]
Electric Constant [math]\displaystyle{ \frac{1}{4\pi\epsilon_0} }[/math] [math]\displaystyle{ 9 \times 10^9 }[/math] [math]\displaystyle{ N \cdot m^2 / C^2 }[/math]
Permitivity of Free Space [math]\displaystyle{ \epsilon_0 }[/math] [math]\displaystyle{ 8.85 \times 10^{-12} }[/math] [math]\displaystyle{ (N \cdot m^2 / C^2)^{-1} }[/math]
Magnetic Constant [math]\displaystyle{ \frac{\mu_0}{4\pi} }[/math] [math]\displaystyle{ 1 \times 10^{-7} }[/math] [math]\displaystyle{ T\cdot m/A }[/math]
Vacuum Permeability [math]\displaystyle{ \mu_0 }[/math] [math]\displaystyle{ 4\pi \times 10^{-7} }[/math] [math]\displaystyle{ T\cdot m/A }[/math]
Proton Charge [math]\displaystyle{ e }[/math] [math]\displaystyle{ 1.6 \times 10^{-19} }[/math] [math]\displaystyle{ C }[/math]
Electron Volt [math]\displaystyle{ eV }[/math] [math]\displaystyle{ 1.6 \times 10^{-19} }[/math] [math]\displaystyle{ J }[/math]
Avogadro's Number [math]\displaystyle{ N_A }[/math] [math]\displaystyle{ 6.02 \times 10^{23} }[/math] [math]\displaystyle{ molecules/mole }[/math]
Atomic Radius (approximate) [math]\displaystyle{ R_a }[/math] [math]\displaystyle{ 1 \times 10^{-10} }[/math] [math]\displaystyle{ m }[/math]
Proton Radius [math]\displaystyle{ R_p }[/math] [math]\displaystyle{ 1 \times 10^{-15} }[/math] [math]\displaystyle{ m }[/math]
E to ionize air [math]\displaystyle{ E_{ionize} }[/math] [math]\displaystyle{ 3 \times 10^{6} }[/math] [math]\displaystyle{ V/m }[/math]
Earth's Magnetic Field [math]\displaystyle{ B_{Earth} }[/math] [math]\displaystyle{ 2 \times 10^{-5} }[/math] [math]\displaystyle{ T }[/math]

--Spennell3 (talk) 14:57, 19 October 2015 (EDT)