You throw an object from the top of the Empire State building straight down with an initial speed (Vi) of 15 m/s. If the acceleration due to gravity (a) is 10 m/s2, how fast will the object be moving (Vf) when it hits the ground 8 seconds (t) later?

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)