8-32 Water at 15°C (p = 999.1 kg/m³ and u = 1.138 × 10-3 kg/m-s) is flowing steadily in a 30-m-long and 6-cm-diameter horizontal pipe made of stainless steel at a rate of 10 L/s. Determine (a) the pressure drop, (b) the head loss, and (c) the pumping power requirement to overcome this pressure drop. 10 L/s - 30 m- FIGURE P8-32 6 cm

A flocculation tank is to be designed for a total flow rate of 45000 m3/d. The following conditions apply to the design: Water temperature 15 C (viscosity =0.00113 N.s/m2) Basin depth 3.8 m, 4 parallel trains of flocculators (each train receives quarter of the total flow). Each train with 9.2m wide, 12.4 long, and rotating paddles are supported on three parallel horizontal shafts. The rotating speed is 1.6 rpm, the center line of the paddles is 1.5 m from shaft. Each shaft has four paddles, each paddle is 25 cm wide and 8.6 m long. Assuming the velocity of water is 35% of the paddle's velocity and the drag coefficient Determine: 1.9. The difference in velocity between paddle and water? The useful power input? The detention time? The value of G and Gt?

V,=5m/s Water enters a 120- horizontal reducing pipe with a velocity of 5m/s and a pressure of 78.48 kNm2. If the diameters atthe entrance and exit sections are 30 cm and 20 cm respecí vely and assuming no degradation of energy within the pipe, find: 60 15. The flow rate passing through the pipe is a) 0.09 m³/s b) 0.1571 m/s c) 0.3534 m/s d) 1.5 m/s 16. The velocity of flow at the exit is a) 11.25 m/s b) 1.77 m/s c) 5.0 m/s d) 25.0m/s 17. The pressure at the exit of the pipe is a) 27.7 kN/m? b) 78.48 kN/m? c) 15.2 kN/m2 d) 81.3 kNm2 18. The horizontal component of the force on the pipe from the water is b) 7315 N a) 7750.7 N c) 5549N d) 9739 N 19. The vertical component of the force on the pipe from the water on pipe is b)4216 N a) 2701 N c) 3459 N d) 5673 N 20. The direction of the resultant force relative to the horizontal direction is b) 23.4. a) 66.6. c) 30. d) 70-