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10 November, 11:05

Why e=mc2? why not e=mc3?

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  1. 10 November, 13:20
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    For starters, this question isn’t really about relativity. It’s about energy, and E=mc^2 only makes sense if energy has the units of (mass) * (velocity) ^2. So we might as well ask: why is kinetic energy defined as KE = ½*mv^2?
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