Question

Can you think of other examples of things you might understand theoretically, but not practically?

Answer 1

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.