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Is energy something physical? Where (if anywhere) is energy stored in atoms / molecyles? For ex. If I raise an object from the ground (thus storing potential energy into it) where does it go?

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Is energy something physical? Where (if anywhere) is energy stored in atoms / molecyles? For ex. If I raise an object from the ground (thus storing potential energy into it) where does it go?	8
How do ice skates work?	1