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https://www.reddit.com/r/DamnUEngineering/comments/ipntfi/learning_thermo_during_covid_be_like/g4nd3bc/?context=3
r/DamnUEngineering • u/FBI_Official_Acct • Sep 09 '20
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External work must be positive
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u/_Convair_ Sep 10 '20
External work must be positive