M represents Mass
no number E=energy m=mass and c=speed of light squared
m = mass.
mass
E (Energy) equals M (Mass) times C2 (speed of light square)
E=m*c2
massM = mass
it means e = MC2 which is M x c x 2
M stands for Mass
m = e*c-2
There is no sum of e=mc2, it is an equation concerning matter and energy. e=mc2 stands for: Energy equals mass times the velocity of light squared. E = M C 2
zero mass = zero energy