A mechanical engineer claims that he inspected a heat engine and found the following information. The heat engine receives heat from a heat source at 1200 oC and rejects heat to a heat sink at 500 oC. The heat engine produces 500 kJ of work and has a thermal efficiency of 40%. Is this heat engine possible? Why? Determine the heat supplied to this engine by the heat source. Determine the heat rejected to heat sink.

a) This heat engine is possible since real efficiency is lesser than theoretical efficiency, b) , c) .

Explanation:

a) The maximum theoretical efficiency of a heat efficiency is given by the Carnot's cycle, whose formula is:

This heat engine is possible since real efficiency is lesser than theoretical efficiency.

b) The heat supplied to the engine by the heat source:

c) The heat rejected to heat sink is:

answer:

constructing a building's framework requires a solid foundation

explanation:

answer:

d. attempt to find the owner, then leave your information if you cannot find them.

explanation:

d. represents both (b) and (c).

more logical as well.

b and c are to complicated.

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