6. Show your work: You have to pick up a spare to complete your amazing bowling game. You throw your 5.50 kg bowling ball down the lane at 6.75 m/s at the last 1.55 kg pin.
The final velocity of your ball is 4.89 m/s after impact. How fast does the pin fly away?

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If the heat engine is a perfect carnot cycle engine, thenefficiency = (t2-t1)/t2   where t1=temperature of cold reservoir ( ° k) = 135            t2=temperature of hot reservoir ( ° k)   = 325thereforeefficiency = (t2-t1)/t2 = (325-135)/325 = 0.5846 = 58%  note: this is the theoretical maximum efficiency of a perfect heat engine.   real-life engines do not achieve this value.