Consider a double wedge airfoil with a maximum thickness of 5% chord at  = 0. a. determine the approximate chord wise location (x/c) of the maximum thickness that produces the minimum drag coefficient (cd) at mach numbers of 2, 4 and 6. [hint: you do not need to investigate locations ahead of 0.4c]. include a composite plot of drag coefficient vs location of maximum

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)