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2. An engine can convert 620 J input energy into 350 J of work? What is...

2. An engine can convert 620 J input energy into 350 J of work? What is the efficiency of the engine and how much energy is needed to be dumped to the nature to save the engine?

[H=Q+W; η= W ] H

3. If an engine is dumping 230 J energy and doing 450 J work, what is the efficiency of the engine? [H=Q+W; η= W ]

4. An engine is taking 1000 J energy and dumping 240 J energy to the nature. What is the efficiency of the energy?

[H=Q+W; η= W ] H

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