1. An airplane wing is designed so that the speed of the air across the top of the wing is 259 m/s when the speed of the air below the wing is 193 m/s. The density of the air is 1.29 kg/m3. What is the lifting force on a wing of area 21.0 m2?
2. A mercury barometer reads 738.0 mm on the roof of a building and 760.0 mm on the ground. Assuming a constant value of 1.29 kg/m3 for the density of air, determine the height of the building.