During a cold Chicago winter, a steady thermodynamic state has been reached in a small pond with a layer of ice on the top. The air directly above the pond is at -7 oC and the ground at the bottom of the pond is held at 2 oC. The pond holds a total of 342.1 m3 of water and has a relatively uniform depth (water and ice) of 1.1 m. Assume the thermal conductivities of ice and water are 0.40 cal/m/s/oC and 0.12 cal/m/s/oC, respectively. **** What is the thickness of the ice? Ok, this problem appears tough. How do I start this ??