Two carnot engines A and B are operated in series. The first one A receives heat at 8 K and rejects toa reservoir at temperature TK. The second engine B receives the heat rejected by the first engine and in turn rejects to a heat reservoir at 2K. Calculate the temperature TK when the efficiencies of the two engines are equal.

Two carnot engines A and B are operated in series. The first one A rec

1.	Two carnot engines A and B are operated in series. The first one A receives heat at 8 K and rejects toa reservoir at temperature TK. The second engine B receives the heat rejected by the first engine and in turn rejects to a heat reservoir at 2K. Calculate the temperature TK when the efficiencies of the two engines are equal.
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