I don't know from what background you're making that statement but in general it's good for people to know that E=mc^2 only when the object is at rest, otherwis

I don't know from what background you're making that statement but in general it's good for people to know that E=mc^2 only when the object is at rest, otherwise you must account for momentum. http://en.wikipedia.org/wiki/Mass%E2%80%93energy_equivalence#Applicability_of_the_strict_mass.E2.80.93energy_equivalence_formula.2C_E_.3D_mc.C2.B2 http://en.wikipedia.org/wiki/Mass%E2%80%93energy_equivalence...