E stands for the energy of the object in question. m stands for it's mass, and c stands for the speed of light in vacuum, ( which is: c = 2.99792458 108 m/s )
Answered by: Anton Skorucak, M.S. Physics, PhysLink.com Creator
'Physicists like to think that all you have to do is say, these are the conditions, now what happens next?'