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[Phys-l] Rest energy

Some physicists cannot give up the term "rest mass;" which should then require the term "moving mass," even though there is only one value for "mass" between any two inertial frames. The term "rest energy" does make sense, being the 0th component of the 4-momentum and therefore having different values in different inertial frames. All of this is within the context of Special Relativity.

James Espinosa