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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: I am trying to say that only E=E. Whereas if energy equals mass a process of conversion were to need to take place which transforms energy to mass but in order to do so takes TIME.

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