Question
Two identical balls, $A$ and $B$ , of uniform composition and initially at the same temperature, each absorb exactly the same amount of heat. $A$ is hanging down from the ceiling while $B$ rests on the horizontal floor in the same room. Assuming no subsequent heat loss by the balls, which of the following statements is correct about their final temperatures, $T_A$ and $T_B$ , once the balls have reached their final state?

Answer

When the balls are warmed, their centre of masses are moving as radii of balls are increasing. The centre of mass of ball $A$ will come down and that of ball $B$ will go up.In case of ball $A,$ the gravitational potential energy decreases.This corresponds to additional heating of ball.

$T_{A}>T_{B}$

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