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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 18 2013: I am not sure about what you are trying to say but I like your way to think! I think we have to remember the fact that they are different units and they must be converted (or at least equivalent), just like U$:1,00 = EUR:0.77 or just as simple as KE = 1/2 mv^2.

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