A MeV is the Mega electron-volt, e.g. million times more than eV. One eV is defined as the energy, that an electron ( or an other single charged (q=1.6*10^-19 Coulombs) particle) gains when it undergoes a potential difference of 1 Volt. In the International units ( SI units) 1eV corresponds to 1.6*10^-19 Joules.
According to Einstein's formula E=mc^2, energy is equivalent to mass (and vice versa), up to the c^2 constant. In SI units, mass is in kilograms , and the speed of light is 3*10^8 m/s.
Therefore, 1eV energy corresponds to m=(1.6*10^-19 Joules)/(9*10^16 m/s)= 1.8*10^-36 Kg=1.8*10^-33 grams. Then 3.2 MeV corresponds to 3.2*10^6*1.8*10^-33 grams=5.7*10^-27 grams. Just as an illustration , the 3.2 MeV mass is roughly 6 times more than the rest mass of an electron.
Therefore, 1eV energy corresponds to m=(1.6*10^-19 Joules)/(9*10^16 m/s)= 1.8*10^-36 Kg=1.8*10^-33 grams.
| Standard Units | |
|---|---|
| Joule | {{joule}} |
| Gigajoule | {{gigajoule}} |
| Megajoule | {{megajoule}} |
| Kilojoule | {{kilojoule}} |
| Millijoule | {{millijoule}} |
| Microjoule | {{microjoule}} |
| Nanojoule | {{nanojoule}} |
| Attojoule | {{attojoule}} |
| Kiloelectron-volt | {{kiloelectronvolt}} |
| Electron-volt | {{electronvolt}} |
| Erg | {{erg}} |
| Other Units | |
|---|---|
| Gigawatt-hour | {{gigawatthour}} |
| Megawatt-hour | {{megawatthour}} |
| Kilowatt-hour | {{kilowatthour}} |
| Kilowatt-second | {{kilowattsec}} |
| Watt-hour | {{watthour}} |
| Watt-second | {{wattsec}} |
| Newton meter | {{newtonmeter}} |
| Horsepower hour | {{horsepowerhour}} |
| Horsepower (metric) hour | {{horsepowermetrichour}} |
| Kilocalorie (IT) | {{kilocalorieit}} |
| Kilocalorie (th) | {{kilocalorieth}} |
| Calorie (IT) | {{calorieit}} |
| Calorie (th) | {{calorieth}} |
| Calorie (Nutritional) | {{calorie}} |
| Btu (IT) | {{btuit}} |
| Btu (th) | {{btuth}} |
| Mega Btu (IT) | {{megabtuit}} |
| Ton-hour (refrigeration) | {{tonhour}} |
| Fuel oil equivalent | {{fueloilequivalent}} |
| Gigaton | {{gigaton}} |
| Megaton | {{megaton}} |
| Kiloton | {{kiloton}} |
| Ton | {{ton}} |
| Dyne centimeter | {{dyne}} |
| Gram-force meter | {{gramforcemeter}} |
| Gram-force centimeter | {{gramforcecentimeter}} |
| Kilogram-force centimeter | {{kilogramforcecentimeter}} |
| Kilogram-force meter | {{kilogramforcemeter}} |
| Kilopond meter | {{kilopondmeter}} |
| Pound-force foot | {{poundforcefoot}} |
| Pound-force inch | {{poundforceinch}} |
| Ound-force inch | {{oundforceinch}} |
| Foot-pound | {{footpound}} |
| Inch-pound | {{inchpound}} |
| Inch-ound | {{inchound}} |
| Poundal foot | {{poundalfoot}} |
| Therm | {{therm}} |
| Therm (EC) | {{thermec}} |
| Therm (US) | {{thermus}} |
| Hartree energy | {{hartree}} |
| Rydberg constant | {{rydberg}} |