A sheet of BCC iron 1 mm thick was exposed to a Carburizing atmosphere on one side and decarburizing on the other at 725 C. After having reached steady state, the iron was cooled quickly to room temperature. The carbon concentrations on the surfaces were determined: 0.012 and 0.0075 wt%. Compute the diffusion coefficient if the flux is 1.4 10^(-8 kg)/m^21-s.

Awater slide of length l has a vertical drop of h. abby's mass is m. an average friction force of magnitude f opposes her motion. she starts down the slide at initial speed vi. use work-energy ideas to develop an expression for her speed at the bottom of the slide. then evaluate your result using unit analysis and limiting case analysis. express your answer in terms of the variables h, m, l, vi, f and appropriate constants. vf v f