As shown in Video V8.13 and Fig. P8.71, water “bubbles up” 3 in. above the exit of the v...

As shown in Video V8.13 and Fig. P8.71, water “bubbles up” 3 in. above the exit of the vertical pipe attached to three horizontal pipe segments. The total length of the 0.75-in.-diameter galvanized iron pipe between point (1) and the exit is 21 in. Determine the pressure needed at point (1) to produce this flow.