Question: A working substance goes through a cycle within which the absolute temperature varies n-fold, and the shape of the cycle is shown in (a) Fig.

A working substance goes through a cycle within which the absolute temperature varies n-fold, and the shape of the cycle is shown in
(a) Fig. 2.4a;
(b) Fig. 2.4b, where T is the absolute temperature, and S the entropy. Find the efficiency of each cycle.

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