A heat engine operating between temperatures of 500 K and 300 Kis used to lift a

Question

A heat engine operating between temperatures of 500 K and 300 Kis used to lift a 10-kilogram mass vertically at a constant speedof 4 meters per second.

a.    Determine the power that the engine mustsupply to lift the mass.

b.    Determine the maximum possible efficiencyat which the engine can operate.

c.    If the engine were to operate at themaximum possible efficiency, determine the following.

      i. The rate at which the hotreservoir supplies heat to the engine.

      ii. The rate at which heat isexhausted to the cold reservoir.

I really needhelp with these types of problems. I need a "livesaver" !! Thanks abunch.

Explanation / Answer

i.. don't understand?

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