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Problem 1: Water (density equal to 1000 kg/m3) flows through a system of pipes that goes up a step. The water pressure is 140 kPa at the bottom of the step (point 1), the cross-sectional area of the pipe at the top of the step (point 2) is half that at the bottom of the step and the speed of the water at the bottom of the step is 1.20 m/s. The pressure at the top of the step is 120 kPa. Find the value of the height h? (10 points) 0 V,