some physical constants
April 29, 2009
| Name | Symbol | Value |
| Speed of Light | c | 2.99792458 x 108 m/s |
| Electron Charge | e | 1.602177 x 10-19 C |
| Gravitation Constant | G | 6.67259 x 10-11 N m2/kg2 |
| Planck’s Constant | h | 6.6260755 x 10-34 J s |
| Boltzmann’s Constant | k | 1.38066 x 10-23 J/K |
| Avogadro’s Number | NA | 6.066 x 1023 molecules/mol |
| Gas Constant | R | 8.314510 J/mol K |
| Electron Mass | me | 9.10939 x 10-31 kg |
| Neutron Mass | mn | 1.67492 x 10-27 kg |
| Proton Mass | mp | 1.67262 x 10-27 kg |
| Permittivity of free space | e0 | 8.854 x 10-12 C2/N m2 |
| Permeability of free space | m0 | 4p x 10-7 Wb/A m |
| Fine Structure Constant | a | 1/137 |
| Rydberg Constant | R¥ | 1.09737 x 107 m-1 |
| Stefan-Boltzann Constant | s | 5.67051 x 10-8 W/m2 K4 |
| Bohr Magneton | mB | 9.2740154 x 10-24 J/T |
| Nuclear Magneton | mN | 5.0507866 x 10-27 J/T |
| Thomson Cross Section | se | 0.66524616 x 10-28 m2 |
| Classical Electron Radius | re | 2.81794092 x 10-15 m |
| So this isn’t really a constant, but it’s annoying to look up | ||
| Jansky | Jy | 10-26 W m-2 Hz-1 10-23 erg cm-2 s-1 Hz-1 |
Entry Filed under: Physics. .
Trackback this post | Subscribe to the comments via RSS Feed