Amarble column of cross-sectional area 1.6 m^2 supports a mass of 26600 kg. the elastic modulus for marble is 5.0 times 10^10 n/m^2. by how much is the column shortened if it is 7.9 m high? express your answer to two significant figures and include the appropriate units.

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)