Shown here is a 250-mm-diameter sphere that contains an embedded electrical heater. The outer surface temperature is 85C and the water temperature is 37C. Determine the power required to maintain the surface temperature of 37C for the following three cases. (6) Q2 (10pts): An additional water velocity in the horizontal direction over the sphere at 0.6 m/s. Mater Q3 (10 pts): An additional water velocity in the downward direction over the sphere at 0.6 m/s. Q4 (10 pts): An additional water velocity in the upward direction over the sphere at 0.6 m/s. 111