TABLE OF CONTENTS These constants are given to a precision which is sufficient for the purposes of this book. For more precise values, see the American Institute of Physics Handbook.
| Acceleration due to gravity at latitude 45 , g | 9.8 | m/s 2 |
| Avogadro s kmolar number, [1] NA | 6.0 10 26 | kmole ?1 |
| Bohr magneton, ? B | 9.3 10 ?24 | J T ?1 |
| Boltzmann s constant, k B | 1.38 10 ?23 | J/K |
| Temperature at which k B T=1 eV, q/k B | 11600 | K/eV |
| Dielectric permittivity of free space, ? 0 | 8.8 10 ?12 | C 2 m ?1 J ?1 |
| Electron volt, eV | 1.60 10 ?19 | J |
| Electronic charge, q | 1.60 10 ?19 | C |
| Gas constant, R 0 ? k B NA | 8.3 10 3 | J K ?1 kmole ?1 |
| Gravitational constant, G | 6.67 10 ?11 | N m 2 kg ?2 |
| Kilocalorie (kcal) | 4.18 10 3 | J |
| Magnetic permeability of free space, ? 0 | 4 ? 10 ?7 | kg m C ?2 |
| Mass (rest mass) of free electron, m 0 | 9.1 10 ?31 | kg |
| Mass of hydrogen atom (1 amu), M H | 1.67 10 ?27 | kg |
| Kmolar volume at STP, [1] V m | 22.7 | m 3 |
| Nuclear magneton, n | 5.0 10 ?27 | J T ?1 |
| Planck s constant, h | 6.6 10 ?34 | Js |
| Dirac h ( h/2 ?), ? | 1.05 10 ?34 | Js |
| Stefan s constant, ? B | 5.7 10 ?8 | Wm ?2 K ?4 |
| Velocity of light, c | 3.00 10 8 | m/s |
| Velocity of sound in air at 300 K, c s | 350 | m/s |
| [1]Note that for consistency with the SI system... |
