The two ends of a cylindrical rod of nickel 120.00 mm long and 12.000 mm in diameter are maintained rigid. If the rod is initially at 50°C, to what temperature must it be cooled in order to have a 0.029-mm reduction in diameter? The values of Poisson's ratio and linear coefficient of expansion for nickel are 0.31 and 13.3 x 10-6 (°C)-1, respectively.