Re: Fun with perpetuum mobile
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Consistently extracting work from the earth's magnetic field could be done on a small scale for a few billion years without violating conservation of energy, though - there is SOME chance this device actually is useful but doesn't work in the way the hype folk claim it does.
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Man, that seems like it's going to have to be a pretty small scale indeed. What is a typical size for random fluctuations in the Earth's field? I don't really have a good enough sense for the physics to make an estimate of something like that.
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