A sheet of steel 4.4 mm thick has nitrogen atmospheres on bothsides at 1200°C and is permitted to achieve a steady-statediffusion condition. The diffusion coefficient for nitrogen insteel at this temperature is 6.2 × 10-11m2/s, and the diffusion flux is found to be 3.5 ×10-7 kg/m2-s. Also, it is known that theconcentration of nitrogen in the steel at the high-pressure surfaceis 5.1 kg/m3. How far into the sheet from this high-pressure side will the concentration be 1.9 kg/m3?Assume a linear concentration profile.