At high altitude air temperature is low and ice formation on wings can cause serious issues for air crafts. A solution to this problem is to install heating elements within the wings. An aircraft is cruising at aspeed of 120 m/s at an altitude around 12,000 ft where air temperature is8C and pressure is 65 kPa. For safety, the surface temperature of the wing is to be maintained at 8C. The characteristic length ofthe wing is 2.1 m. The area of the wing is 2.1 m by 6 m. Previous measurements showed that the averagefriction coecient between the wing and air at this condition is 0.002. You can assume the air ow to beturbulent throughout. Determine the average heat ux that the heater must be able to supply for safe ying conditions.