Select the correct answer. What is the momentum of a 35-kilogram cart moving at a speed of 1.2 meters/second?
A. 42 kilogram-meters/second
B. 70 kilogram meters/second
G 4.2x 10 kilogram meters/second
D. 70 x 10 kilogram meters/second
X

Asheet of steel 1.5 mm thick has nitrogen atmospheres on both sides at 1200oc and is permitted to achieve a steady-state diffusion condition. the diffusion coefficient for nitrogen in steel at this temperature is 6 x 10- 11 m2 /s, and the diffusion flux is found to be 1.2 x 10-7 kg/m2 -s. also, it is known that the concentration of nitrogen in the steel at the high-pressure surface is 4 kg/m3 . how far into the sheet from this high-pressure side will the concentration be 2.0 kg/m3 ? assume a linear concentration profile.