Two Carnot engines \( A \) and \( B \) are operated in series. The ...

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Two Carnot engines \( A \) and \( B \) are operated in series. The first one A receives heat at \( 800 \mathrm{~K} \) and rejects to a reservoir at temperature T K. The second engine B receives the heat rejected by the first engine at temperature \( \mathrm{T} \) and in turn
- rejects to a heat reservoir at \( 300 \mathrm{~K} \). Calculate the - temperature \( T \mathrm{~K} \) for the following situations :
The outputs of the two engines are equal.
\( \mathrm{E} \)
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