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Covers the study of (primarily homogeneous) macroscopic systems from a heat/energy/entropy point of view. Consider also using the tag: [statistical-mechanics].

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Why does a piston oscillate at a much lower frequency than a standing wave within a tube?

I have a thermoacoustic engine, with a stack producing sound waves - the piston is attached to the open end of the tube, but why does it oscillate at a much lower frequency than the sound wave itself. …
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Thermoacoustic mechanism for a thermoacoustic engine

How exactly does a thermoacoustic engine work? (I don't mean the engineering part) I understand the part on the Brayton cycle occurring and all, but how might we measure the numerical efficiency for a …
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