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Unformatted text preview: and bowl) has increased. Because energy must be conserved, the difference in the internal energy of the system (marble and bowl) before we lift the marble and start it rolling, and after it comes to equilibrium ( i.e. , stops rolling), must be equal to the work we performed on the system. U = U final - U initial = w work performed on the system. In this example, the initial and final states of the system look the same to the naked eye, that is, a marble sitting on the bottom of the bowl and not rolling. However, on closer inspection, one would noticed that the marble and bowl of the final state will have a slightly higher temperature due to the increased internal energy. Temperature is a measure of the degree of random motion of the atoms and molecules in a particular substance....
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- Fall '10