E is the amount of energy in an atom or molecule of a substance. M is the mass or the amount of that substance. C is the speed of light that never changes and is equal to 299,792,458
http://wiki.answers.com/Q/What_is_the_meaning_of_E...

The equation Einstein discovered between energy and mass(E=mc²) states that matter and energy
http://www.chacha.com/question/whatdoese%3Dmc2m...

E = mc². Einstein's famous equation says that mass (m) is equivalent to energy (E) The recognition that the two quantities are related was Einstein's stroke of genius. The speed
http://answers.yahoo.com/question/index?qid=201306...

E=mc^2 is Einstein’s famous equation. Matter (mass) can be converted to energy. This equation tells us how much energy is released by the total conversion of a unit of mass.
http://answers.yahoo.com/question/index?qid=200907...
