There are are only three parts to Einstein’s most famous statement:
E, or energy, which is the entirety of one side of the equation, represents the system's (Object) total energy.
m, or mass, is related to energy by a conversion factor.
And c2 is the speed of light squared: the right factor we need to make mass and energy equivalent.
Even masses at rest have an energy inherent to them.
Mass can be converted into pure energy. This is the second meaning of the equation, where E = mc2 tells us exactly how much energy you get from converting mass. For every 1 kilogram of mass you turn into energy, you get 9 × 1016 joules of energy out, which is the equivalent of 21 Megatons of TNT.
Energy can be used to make mass out of nothing… except pure energy.
The c squared term basically comes from the kinetic energy of an object in motion that is for a body of mass m moving at a velocity of v the kinetic energy increases as v squared now to sort out the squared term.
Link and videos about the equation derivation of equation E = mc^2
if i take a object with its mass calculated and i move up relative to the earth the energy of that object is increasing because it gained potential energy but its mass did not increase nor the speed of light so am i now creating energy ??