Q2: Potatoes (k=0.50W/mK and =0.13106m2/s) that are initially at a uniform temperature of 25C and have an average diameter of 6cm are to be cooled by refrigerated air at 2C flowing at a velocity of 4m/s. The average heat transfer coefficient between the potatoes and the air is experimentally determined to be 19W/m2K. Determine the following assuming that the potatoes is are uniform spherical in shape, a) How long it will take for the center temperature of the potatoes to drop to 6C. b) If any part of the potatoes will experience chilling injury during this process as the chilling injury is typically seen at the temperature below 4C for potato