Aheat engine takes thermal energy qh from a hot reservoir and uses part of this energy to perform work w. assuming that qh cannot be changed, how can the efficiency of the engine be improved?
a) increase the work w, the thermal energy qc rejected to the cold reservoir increasing as a result.
b) decrease the work w, the rejected qc decreasing as a result.
c) increase the work w, the rejected qc remaining unchanged.
d) increase the work w, the rejected qc decreasing as a result.
e) decrease the work w, the rejected qc remaining unchanged
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