An engine absorbs 2000j of heat from a hot reservoir and expels 750j to a cold reservoir during each poerating cycle, (i)what is the efficiency of the engine (ii)How much work is done during the cycle? (iii)What is the power output of the engine if each cycle last for 0.5 seconds?

Question

An engine absorbs 2000j of heat from a hot reservoir and expels 750j to a cold reservoir during each poerating cycle, (i)what is the efficiency of the engine (ii)How much work is done during the cycle?  (iii)What is the power output of the engine if each cycle last for 0.5 seconds?

Elena · Accepted Answer

η={Q(h) –Q(c)}/ Q(h) = =(2000-750)/2000=0.625 => 62.5%. W= Q(h) –Q(c) =2000-750=1250 J. P=W/t=1250/0.5 =2500 W

Anonymous · Answer

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Anonymous · Answer

Expansion joints are used for materials that easily expand and contract depending upon its temperature.How much expansion can take place for a brass pipe 25.8m long that experiences temperature changes of 75.2c