Solve the following problem:
Q: In the first stage of a paper drying process, a cylinder of diameter 0.15 m is covered by moisture-soaked paper. The temperature of the paper is maintained at 70°C by imbedded electrical heaters. Dry air at a velocity of 10 m/s and temperature of 20°C flows over the cylinder.
(a) Calculate the required electrical power and the evaporation rate per unit length of the cylinder, q' and n'A, respectively.
(b) Generate plots of q' and n as a function of the dry air velocity for 5 < v="">< 20="" m/s="" and="" for="" paper="" temperatures="" of="" 65,="" 70,="" and="">