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A 45 m/s (100 mph) wind blows across the top of a flat-roofed house. Calculate the net force on the roof due to the pressure differential from inside the house to the outside. Assume that the pressure in the house is atmospheric pressure and that the roof...

Calculate the speed with which water flows from a hole in the dam of a large irrigation canal. The hole is 0.80 m below the surface of the water. If the hole has a radius of 2.0 cm, what is the flow rate of the water from the hole?