Yes. The units require a constant with units of speed^2. Any such constant can always be expressed as some multiple of c^2. The c^2 isn't a big thing with deep meaning, it is just a question of units.Are all physics theories based on "the equivalence of energy E and mass m always reliant on the speed of light c?
Did you even read my response?thus eliminating any other constant as a point of reference to c?
Thanks for your response. I appreciate it. However I just want to be sure that this means that all existent energy theories present use the speed of light as a point of constant reference thus eliminating any other constant as a point of reference to c?