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E=MC2 means: Energy (E) = Mass (M) times The Speed of Light (C) squared. This basically tells us that energy and matter are the same. A small amount of matter can be converted into a large amount of energy. So using the equation E=MC2 we can find out that 0.00000000001 gram of mass, will equal nine hundred thousand joules of energy:

0.00000000001g x (3x108) = 900,000j

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Q: What does E equals mc2 calculate?
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