Question:

PHYSICS! help please?

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A carnot engine receives 1000 J from the high temperature reservoir at 500 degrees celsius and does 450 J of work during a cycle. What is the temperature of its low temperature reservoir?

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  1. it has efficiency of 450/1000=.45 (45% - work obtained / heat given).

    carnot formula: efficiency= (Th-Tl)/Tl = .45 = (737-tl)/737 (in Kelvin!!)

    so tl=405K that is 132 degC...

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