# 1. The initially closed valve in Figure IIIb.6.1(b) suddenly opens. Find the time it takes velocity.

1. The initially closed valve in Figure IIIb.6.1(b) suddenly

opens. Find the time it takes velocity to reach 99% of its steady-state value.

Assume that fluid is inviscid and L = 30 ft, ho = 7 ft, D = 1 in.

2. The initially closed valve in Figure IIIb.6.1(b) suddenly

opens. Find the flow velocity 5 seconds after the valve is opened. Data: L =

1000 ft, ho = 50 ft, Vo = 10 ft/s.