Constant Matters

Pi_NumberPhysical 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}


World Views

Astronomical Beginnings

Early astronomers already make the distinction between stars and planets, as the former remain relatively fixed for centuries, while the latter wander an appreciable amount in a comparatively short time.  But that’s not all!

Continue reading World Views

Little 'Bytes' about Natural Phenomena, Theoretical Physics and the Latest Worldwide Scientific Findings. Edited from Glasgow, Scotland.


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