At a maximum level of loudness, the power output of a 75-piece orchestra radiated
as the sound is 70.0 W. What is the intensity of these sound waves to a listener who is
sitting 25.0 m from the orchestra?

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)