1. Calculate the maximum safe heat flux in the nucleateboiling regime for water flowing at a velocity of 15 m/s through a 0.31-m-long, 1.2-cm-ID tube if the water enters at 1 atm and 100°C.
2. A horizontal, 2.5-cm-OD tube is maintained at a temperature of 27°C on its outer surface. Calculate the average heat transfer coefficient if saturated steam at 12 kPa is condensing on this tube