some changes, fixed power subscript
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@@ -72,5 +72,5 @@ P=\frac{\mathrm{d}W}{\mathrm{d}t}
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An important characteristic of all engines (machines that transform stored potential energy into kinetic energy) is their **efficiency** $e$. I must note that the use of $e$ is incredible insensitive and stupid, but I digress.
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An important characteristic of all engines (machines that transform stored potential energy into kinetic energy) is their **efficiency** $e$. I must note that the use of $e$ is incredible insensitive and stupid, but I digress.
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e=\frac{P{\mathrm{out}}}{P_\mathrm{in}}
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e=\frac{P_{\mathrm{out}}}{P_\mathrm{in}}
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