A water jet pump has an area Aj = 0:06 ft2 and a jet velocity vj = 90 fps, which entrains a secondary stream of water having a velocity vs = 10 fps in a constant-area pipe of total area A = 0.6 ft2. At section 2, the water is thoroughly mixed. Assuming one-dimensional flow and neglecting wall shear
(a) Find the average velocity of mixed flow at section 2;
(b) Find the pressure rise (P2 - P1), assuming the pressure of the jet and secondary stream to be the same at section 1.