this post was submitted on 11 Nov 2024
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Key context: thermodynamics dictates that heat engines waste a lot of energy.

Credit: Karin Kirk

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[–] silence7@slrpnk.net 11 points 3 days ago

The fuel becomes hot because the nuclear reaction in it is producing both light (eg: gamma rays) and fast-moving subatomic particles. These both interact with the rest of the fuel to heat it up.