a puckoves 2.35m/s in a -22.0direction. a hockey stic pushes it for .0215 s, anging its velocity to 6.2m/s in a 50.9 direction. what was the magnitude of the acceleration?

Carbon is allowed to diffuse through a steel plate 15 mm thick. the concentrations of carbon at the two faces are 0.65 and 0.30 kg c/m^3 fe, which are maintained constant. if the preexponential and activation energy are 6.2 x 10-7 m2 /s and 80,000 j/mol, respectively, compute the temperature at which the diffusion flux is 1.43 x 10^-9 kg/m^2 -s.