Scientific Specific Units

[Dirk.]

Hi,
to answer Tim's question where the unit MeV/c² should go:

MeV/c² has the dimension of a mass (E=mc²). It has to go to the Units->Mass-menu, since MeV is already in the Energy-menu. Anything else would be inconsistent.

c is already in the physical constants.

The prime behaves correctly:
Enter 0.511MeV (i.e. the rest-mass o the electron), divide it by c*c taken together with its unit _m/s from the built in constants:

0.511_MeV
--------------------. You get some Number in the unit MeV*s²/m²
299..._m/s*299...m/s

Use CONVERT (strange number with its strange unit, 1_kg) and you get 9,109..E-31_kg. You can check the result using the CONSTANTS->PHYSICS->me.

Everything is working nicely.