A shopper in a supermarket pushes a loaded cart with a horizontal force of 13 n. The cart has a mass of 27 kg. (a) how far will it move in 4. 0 s, starting from rest? (ignore friction. ).

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.