A sheet of steel 1.6mm thick has nitrogen atmospheres on both sides at 1200C and is permitted to achieve a steady-state diffusion condition. The diffusion coefficient for nitrogen in steel at this temperature is 6.11011m2/s, and the diffusion flux is found to be 1.0 107kg/m2-s. Also, it is known that the concentration of nitrogen in the steel at the high-pressure surface is 5.1kg/m3. How far into the sheet from this high-pressure side will the concentration be 3.6kg/m3 ? Assume a linear concentration profile. m