megaelectron volt per c
Momentumexact by definition
The megaelectronvolt per c is the particle physicist's momentum unit, about 5.344286 × 10⁻²² kilogram metres per second. It comes from the relativistic relation E² = (pc)² + (mc²)², which makes momentum times c an energy, so quoting momentum in energy units and dividing by c is the natural bookkeeping.
Watch out: The unit is exact because both the electronvolt and the speed of light are exact in the current SI. Detector papers frequently drop the c entirely and write momenta in MeV, relying on the reader to know that natural units set c = 1.
| 1 | 5.3442860e-22 |
One megaelectron volt per c in every momentum unit
| 1 | megaelectron volt per c (MeV/c)this unit | |
| 0.001 | gigaelectron volt per c (GeV/c) | |
| 5.34429e-17 | gram centimeter per second (g·cm/s) | |
| 5.34429e-17 | dyne second (dyn·s) | |
| 5.34429e-19 | millinewton second (mN·s) | |
| 3.86553e-21 | pound foot per second (lb·ft/s) | |
| 5.34429e-22 | kilogram meter per second (kg·m/s) | |
| 5.34429e-22 | newton second (N·s) | |
| 1.20144e-22 | pound-force second (lbf·s) | |
| 1.20144e-22 | slug foot per second (slug·ft/s) | |
| 5.34429e-25 | kilonewton second (kN·s) | |
| 5.34429e-25 | tonne meter per second (t·m/s) |
Solvers that use momentum