Understanding mechanical concepts

  • #51
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to energy stored in an atom

it is stored on the bonds with the electrons releasing photons and jumping energy levels
 
  • #52
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You should also note that friction is a very complicated phenomenon. All our theories and explanations concerning it are mere derivations from the experimental world. And they involve significant approximation. People still do research on it.
 
  • #53
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The bullet example was misconstrued, but I was addressing elastic collisions in general. It's kind of pedantic to detract from my argument just because of this one example, when it can easily be seen that I could be talking about a tennis ball bouncing off a tennis racket or any other kind of elastic collision.

If pedantic means insisting on following physical evidence from experiment rather than speculation, I plead guilty.
 

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