Units, Conversion Factors and Constants

Viscosity N s/m ²

Electric Field V/m

Mass of Sun 1.99x10 ³⁰ Kg

Capacitance frad, F

Charge coulomb, C

Resistance ohm, Ω

Inductance henry, H

Moments N m or Kg m ² /s ²

Torque N m or Kg m ² /s ²

Light Year 9.46x10 ¹⁵ m

Angstrom 10 ^-10 m

hp 750W

Atmosphere 1.01x10 ⁵ N/m2

eV 1.6x10 ^-19 Joules (J)

atomic mass unit, u, 1.66x10 ^-27 Kg

Speed of Light, c 3x10 ⁸ m/s

Gravitational Constant, G, 6.67x10-11Nm ² /Kg ²

Avagadros's Number, N _A , 6.023x10 ^-23 particles

Universal Gas Constant, R, 8.314 J/g mole K

Planck's Constant, h, 6.63x10 ^-34 J s

Charge on Electron, e, 1.602x10 ^-19 C

Electron Rest Mass m _e , 9.11x10 ^-31 Kg

Proton or Neutron Rest Mass, m _p , 1.67x10 ^-27 Kg

Coulomb's Law Constant 9x10 ⁹ Kg m ² /s ² /C ²

Permeability Constant, μ ₀ =4πx10 ^-7 Kg m/s ² /C ²

Mass of Earth 5.98x10 ²⁴ Kg

Radius of Earth 6.38x10 ⁶ m

Earth – Sun Distance, 1 Astronomical unit, 1.496x10 ¹¹ m

Earth – Moon Distance 3.84x10 ⁸ m