It is desired to transport liquid metal through a pipe embedded in a wall at a point where the temperature is 650 k. a 1.2‐m‐thick wall constructed of a material having a thermal conductivity varying with temperature according to k = 0.0073 (1 + 0.0054 t), where t is in k and k is in w/m ⋅ k, has its inside surface maintained at 925 k. the outside surface is exposed to air at 300 k with a convective heat‐transfer coefficient of 23 w/m2 ⋅ k. how far from the hot surface should the pipe be located? what is the heat flux for the wall?