Answer:
Best example would be Carnot engine. It is possible in theory not in real life.
Explanation:
In real engines, the heat transfers at a sudden change in temperature whereas in a Carnot engine, the temperature remains constant. In our day to day lives, reversible processes can't be carried out and there is no such engine with 100 % efficiency. Thus, the Carnot cycle is practically not possible.
Answer:
the envelope of gases surrounding the earth or another planet.
Explanation:
(oop)
Having food means that there people won’t starve and can bring in trade
B. is the answer.
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