What does E=MC2 mean?

Answer 1

E is energy, M is mass, and C is the speed of light.

Remember the speed of light is a very big number. And when you multiply that by itself, you get an ever larger number.

So Energy = Mass * Really Big Number.

And as a result, even a very small amount of matter holds a large amount of energy. Now think about the amount of energy held by the matter forming the Earth. Then, consider that the Earth is a very, very, very small fraction of the universe, and just consider the amount of energy it takes to form the entire universe. Now that is mind-blowing.

Without any math details, that is what E=MC^2 means

Answer 2

In nuclear reactions of fission and fusion, mass disappears and appears as energy. This equation establishes the equivalence of mass and energy. E is the energy, M the mass and C the velocity of light in vacuum. Since C^2 is involved in the equation, even a small M gives rise to a large Energy.

Similarly under some conditions, high energy gamma rays suddenly produce a pair of particles like an electron and a positron which is identical to the electron in all respects except for its positive electrical charge. This proves that mass and energy are interchangeable under the right conditions.

Answer 3

This was Einstein's Theory of Relativity formula, or Mass-Energy Equivalence. It is basically the concept that there is energy in any mass, even at rest, and that this energy is proportional to its mass.

E = Energy or Rest Energy.
M = Mass, or Invariant Mass.
C = Speed of Light in a vacuum.

If the mass is not at rest, then the formula must take into consideration the momentum. But that is another discussion.

This theory was published in 1905, in Einstein's paper entitled, "Does the Inertia of a Body Depend Upon Its Energy Content?"

Answer 4

Well that's hard to explain. If you break it down, E=energy, M=mass, C^2=speed of light (squared). This equation states how little matter, can release a huge amount of energy, like the one released in a nuclear reaction. This all relates to Einsteins relativity. This equation is very complex. Regardless of what someone may tell you, a prestigious mathematician/scientist once said that there are only a handful of people that truly understand this in it's entirety.

Answer 5

E = energy
M = mass
C = speed of light (it's 3*10^8 m/s)
Sorry, I can't explain any more things. I'm 13 (^_^!)

Answer 6

the energy evolved in a neuclear reaction is directly proportional to the mass difference occured during the reaction. the proportanality constant is taken c2.
c2 is square of the speed of light in vaccum.

Answer 7

It means energy in the atom.

Answer 8

It's all explained here:
http://www.theallineed.com/math/06012912.htm

Answer 9

it means energy=mass*c squared, i think.

Answer 10

http://en.wikipedia.org/wiki/Mass-energy_equivalence