A 0.56 kg object travels from point A to point B. If the speed of the object at point A is 7.0 m/s and the kinetic energy at point B is 8.0 J, determine the following. a. Kinetic energy of the object at point A
b. Speed of the object at point B

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.