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Analyse
traitement de l'eau
distillation
electrolyse
separation
polymerisation
hydrocarbures
reacteurs
organique
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Universal constants in Physics
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| Constant | Symbol | Value |
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| Gravitational acceleration | g | 9.81 m s-2 |
| Gravatational Constant | G | 6.673 x 10-11Nm2kg-2 |
| Avogadro's number | NA | 6.023 x 1023mol-1 |
| Water triple point | Twater | 273.15K |
| Ideal gas constant | R | 8.314JK-1mol-1 |
| torr | torr | 133.32Pa |
| Boltzmann's Constant | k | 1.381 x 10-23JK-1 |
| Stefan's Constant | σ | 5.670 x 10-8Wm-2K-4 |
| Rydberg's Constant | Rhc | 1.097 x 107m-1 |
| Planck's Constant | h | 6.626 x 10-34Js |
| Light velocity(vacuum) | c | 2.998 x 108ms-1 |
| Proton's charge | e | 1.602 x 10-19C |
| Electron's charge | me | 9.109 x 10-31kg |
| Masse atomic Unit | u | 1.66 x 10-27kg |
| Electrical's Constant | ε0 | 8.854 x 10-12Fm-1 |
| Magnetic's Constant | μ0 | 4π x 10-7Hm-1 |
| Bohr's Constant | μB | 9.274 x 10-24Am2 |
| Nuclear Magneton | μN | 5.051 x 10-27Am2 |
| Fine structure constant | α | 7.297 x 10-3 |
| Electronic wavelength | λc | 2.426 x 10-12m |
| Bohr's radius | a0 | 5.2918 x 10-11m |
| Angstrom | Ǻ | 10-10m |
| barn | b | 10-28m2 |
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