Two bodies at different temperatures `T_(1) and T_(2)`, if brought in thermal contact do not necessarily settle to the mean temperature `(T_(1)-T_(2))//2`. Why ?

Define criticial temperature (T_(e))

When the same quantity of heat is absorbed by a system at teo different temperatures T_(1) and T_(2) , suchd that T_(1)gtT_(2) , change in entropies are DeltaS_(1) and Delta S_(2) respectively . Then :

The voltage V and current I graphs for a conductor at two different tempratures T_(1) and T_(2) are shown in the figure .The relation between T_(1) and T_(2) is

If k_(1) and k_(2) are rate constants at temperatures T_(1) and T_(2) respectively then according to Arrhenius equation :

Two spherical black bodies of radii r_(1) and r_(2) and with surface temperatures T_(1) and T_(2) respectively, radiate the same power. Then r_(1)//r_(2) must be equal to