Frequently used physical and Constants for Sikkim PSC
Download PDF of This Page (Size: 155K) ↧
Frequently used constants:
| Constant | Symbol | Value |
| Alpha particle mass |
|
|
| Avogadro constant |
|
|
| Boltzmann constant |
|
|
| Electron mass |
|
|
| Electron volt |
|
|
| Electronic charge |
|
|
| Faraday constant |
|
|
| Gravitational constant |
|
|
| Neutron mass |
|
|
| Permeability of free space |
|
|
| Permittivity of free space |
|
|
| Planck constant |
|
|
| Proton mass |
|
|
| Proton-electron mass ratio |
|
|
| Speed of light |
|
|
| Universal gas constant |
|
|
Particle physics:
| Class | Name | Symbol | Mass | Mean life | Year of discovery |
| Leptons | Electron Neutrino Muon Tau |
| 1
207 3500 | Stable Stable
| 1897 1957 1937 1975 |
| Mesons | Pi meson K meson |
| 273 264 ≈970 |
? | 1947 1947 1947 |
| Baryons | Proton Neutron Lambda Sigma Chi omega |
| 1836 1839 2183 2327 2573 3272 |
| 1897 1932 1947 1953 1954 1964 |