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....