Question

A solid body X of heat capacity C is kept in an atmosphere whose temperature is $T_A = 300 K$. At time t = 0, the temperature of X is $T_0 = 400 K$. It cools according to Newton’s law of cooling. At time$t_1$ its temperature is found to be 350 K. At this time ($t_1$) the body X is connected to a large body Y at atmospheric temperature $T_A$ through a conducting rod of length L, cross-sectional area A and thermal conductivity K. The heat capacity of Y is so large that any variation in its temperature may be neglected. The cross-sectional area A of the connecting rod is small compared to the surface area of X. Find the temperature of X at time $t=3t_1$.

Answer 1

Hyderabad: Andhra Pradesh Chief Minister N Chandrababu Naidu set himself a hard target to complete the development of the new capital at Vijayawada by the end of 2017.