Category Archives: Physics

Algebra, Geometry, History of Science, Mathematics, Physics

Constant Matters

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Physical Constants (SI Units)

Avogadro Constant

N_{A} = 6.022 \times 10^{23} mol^{-1}

Bohr Radius

a_0 = 5.29 \times 10^{-11} m

Boltzmann Constant

k = 1.381 \times 10^{-23} JK^{-1}

Charge on an Electron

e = - 1.602 \times 10^{-19} C

Gravitational Constant

G = 6.673 \times 10^{-11} Nm^{2} kg^{-2}

Magnitude of Acceleration due to Gravity

g = 9.81 m s^{-2}

Permeability of Free Space 

\mu_{0} = 4 \pi \times 10^{-7} T m A^{-1}

Permittivity of Free Space 

\epsilon_{0} = 8.854 \times 10^{-12} C^{2} N^{-1} m^{-2}

Speed of Light in a vacuum

c = 2.998 \times 10^{8} m s^{-1}