Convert energy into Hartree energy in emacs

There is a neat program in emacs which is called (GNU Emacs Calc Manual). Up to now in order to do energy conversion I always wrote small scripts in whatever language to do this. Now I discovered that you do these conversions also in emacs, you can do M-x calc, insert an algebraic form typing ' followed by 1.5 ev, which inputs 1.5 electron volt into the stack of the calculator.

Ale's Ecke
#Fock : #Hartree method did not respect principle of antisymmetry of the wave function. Hartree method used #Pauli exclusion principle in its older formulation, forbidding presence of two electrons in same quantum state. Hence neglects #quantumstatistics
#Fock : #Hartree method did not respect principle of antisymmetry of the wave function. Hartree method used #Pauli exclusion principle in its older formulation, forbidding presence of two electrons in same quantum state. Hence neglects #quantumstatistics
The #Hartree voltage UH is derived for a cylindrical magnetron in the relativistic limit with and without an axial current. ... The absence of large microwave power outputs at large axial currents may be caused by the finite axial length of the #magnetron.
The #Hartree voltage UH is derived for a cylindrical magnetron in the relativistic limit with and without an axial current. ... The absence of large microwave power outputs at large axial currents may be caused by the finite axial length of the #magnetron.