>If you spin up a wheel in the vacuum of space, it's going to keep spinning fore... | Hacker News

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		hermitcrab 6 months ago \| parent \| context \| favorite \| on: The contrarian physics podcast subculture >If you spin up a wheel in the vacuum of space, it's going to keep spinning forever. Even interstellar space is not 100% vaccuum. So it will slow from the occasional contact with matter. No doubt it would take a very long time, though.

glenstein 6 months ago [–]

Right. And also efficiency is about its interaction as part of a system, which is the difference between perpetual motion, and perpetual motion machine.

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