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Jun29-06, 03:14 AM
You are not able to answer without to offend? In accordance with Mermin's statement the potential energies of the cube and of the sphere are different!
sine ira et studio
Doubt it. Not in a "uniform vertical gravitational field". I may be mistaken but you can calculate the volume integrals and you will find out. Either way, what does this have to do with relativity?