why can't energy be created or destroyed i want to know the reason
1
Expert's answer
2012-10-11T11:23:05-0400
If you've studied mechanics a bit, you know that conservation of energy is equivalent to stating that the laws of physics are invariant under translation in time. Physics is the same now as it was a couple minutes ago and as it will be in a couple of minutes. This guarantees conservation of energy.
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