Answer the following questions.

recall that the racecar is 2.5 feet from the center of the race track and starts at the 12-o'clock position.

write a formula that expresses the car's horizontal distance to the right of the center of the race track, h , in terms of θ (which is measured from the 12 o'clock position).

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.