Solve the following:
Q: Velocity and temperature profiles for laminar flow in a tube of radius ro = 10 mm have the form u (r) = 0.1 [1 - (r/ro)2] T(r) = 344.8 + 75.0(r/ro)2 - 18.8(r/ro)4 with units of m/s and K. respectively. Determine the corresponding value of the mean (or bulk) temperature, T8 at this axial position.