Physics - Heat & Thermo Question with Solution | TestHub

Two adiabatic vessels each hold 0.5 kg of water ($s=4200$ J $k{g}^{-1}$$K^{-1}$) at different temperatures. They are joined by a rod of length 0.4 m, area $2\times 10^{-4}$ $m^2$ and conductivity 100 W $m^{-1}$$K^{-1}$, with the rest of the rod insulated. Find the time in seconds for the temperature difference to fall to $\frac{1}{e}$ of its original value (nearest whole number).