A cast iron pipe has an inside diameter of 18 in and a wall thickness of 0.50 in. The pipeline is 1000 ft long and the flow velocity is 5 ft/s with a water temperature of 70°F. a. If a valve at the...

A cast iron pipe has an inside diameter of 18 in and a wall thickness of 0.50 in. The pipeline is 1000 ft long and the flow velocity is 5 ft/s with a water temperature of 70°F.

a. If a valve at the end of the line is closed instantaneously, what will be the pressure increase experienced in the line?

b. Over what length of time must the valve be closed in order to create a pressure increase equivalent to that associated with instantaneous closure?