Materials for engineering, 3rd Edition - (Malestrom)

Appendix I
Useful constants
Symbol SI units
Absolute zero temperature
–273.2°C
Acceleration due to gravity g 9.81 m s –2
Avogadro constant N A 6.023 × 10 23
Base of natural logarithms e 2.718
Boltzmann constant k 1.38 × 10 –23 J K –1
8.62 × 10 –5 eV K –1
Electron charge e 1.60 × 10 –19 C
Electron mass m e 9.11 × 10 –31 kg
Faraday constant F 9.648 × 10 4 C mol –1
Gas constant R 8.31 J K –1 mol –1
Permeability of free space µ o 4π × 10 –7 H m –1
Permittivity of free space ε o 8.85 × 10 –12 F m –1
Planck constant h 6.63 × 10 –34 J s
Proton mass m p 1.67 × 10 –27 kg
Velocity of light in vacuo c 3 × 10 8 m s –1
Volume of perfect gas at STP 22.41 × 10 –3 mol –1
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