The solar constant is a. the same for a sphere or for a circle. b. only about a quarter of all energy emitted by the sun. c. a consistent amount of energy received at the top of the atmosphere. d. the same value for all planets, even Neptune.

Water is siphoned from a large tank and discharges into the atmosphere through a 50-mm diameter tube. the end of the tube is b = 2.1 m below the tank bottom which is a = 7.4 m deep, and viscous effects are negligible. determine the maximum height h over which the water can be siphoned without cavitation occurring. atmospheric pressure is 101.4 kpa, and the water vapor pressure is 1.79 kpa (absolute)