Water flows from a reservoir into a rigid horizontal pipe whose intake is 52m below the surface elevation of the reservo

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Water flows from a reservoir into a rigid horizontal pipe whoseintake is 52m below the surface elevation of the reservoir. The pipe discharges through a valve into the atmosphere and is 0.6min diameter and 1.5km long. Assuming a rigid water columncalculate the pressure rise at the valve if it is closed in 4.5seconds. Assume a friction factor of 0.008. If thevalve is re-opened at some later time, calculate the time taken forthe flow to accelerate to 65% of its steady state value.(120.63m,8.3s)