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Why does a penny become warmer when it is struck with a hammer?

Why does a penny become warmer when it is struck with a hammer?
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Why does a penny become warmer when it is struck with a hammer?

User Leberknecht
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1 Answer

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Because the penny absorbs the kinetic energy from the impact and releases it back into the environment as heat since the energy cannot be stored as potential energy.
User Kiaurutis
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