Heat and Temperature

Find out the heat current and temperature at any distance x.

Heat , Temperature || Thermal Equilibrium and Zeroth Law OF Thermodynamics || Thermodynamic System

Two Carnot engines A and B are operated in series. The engine A receives heat from the source at temperature T_1 and rejects the heat to the sink at temperature T. The second engine B receives the heat at temperature T and rejects to its sink at temperature T_(2) . For what value of T the efficiencies of the two engines are equal?

A black body radiates heat at temperatures T_(1) and T_(2) (T_(2) gt T_(1) the frequency corresponding to maxium energy is