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Fabian Lapp

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Why does E=mc²?

I think we can all agree that 1=1 but how can you say that E=mc². No one would say the E is the same letter as m.
One example I'd like to make is that NaCl=Na+ + Cl-
But in chemistry you do not use the equals sign you use arrows that indicate a process of conversion which is reversible.
Just as the conversion from energy to mass.

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      May 19 2013: Energy itself is one, and mass is another one. E = mc² says is that matter and energy are interchangeable.
      Energy can transform into matter and matter can transform into energy. They are just different pieces of the same puzzle, and both of them can be derivative of something else, mass could be in a different "currency" such as protons and neutrons, then be converted to mass and be interchanged with Energy.

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