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Re: Any restrictions on engines?
Quote:
Originally Posted by Nate Laverdure
This definition leaves out steam engines, stirling engines, and perhaps others.
Maybe: an engine takes advantage of differences in pressure, specific volume, and/or temperature to do useful work on a system.
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A steam or sterling engine would burn some material which would then heat water. On the other hand, I do like the idea of a pressure change being used to do work as part if the definition. That's probbably a more widely acceptable definition.
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p.s. note that 5-1/2 hours in the car with your daughter on the way to IRI is NOT the same as 10 hours in the van with seven members of Team 116 on the way to IRI. One is a wonderful familial experience, the other is an opportunity to go insane. - dlavery [more] 
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