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Briggs
10 November, 11:05
Why e=mc2? why not e=mc3?
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Kirsten Bryan
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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