Question

1. If the velocity of water changes uniformly along the transition from VA = 10 m/s to VB = 4 m/s. determine the pressure difference over the distance x.

2. Air is pumped into the top of the tank so that the pressure at B is 40 kPa. Determine the discharge of water through the drainpipe when h = 5 m.

Answer 1

1.

$\Delta p=\frac{\rho}2\Delta v^2=42~kPa.$

2.

$Q=\frac pv=\frac p{2gh}=40~\frac ls.$