Question

4. An old, rough-surfaced, 2-m-diameter concrete pipe with a Manning coefficient of 0.025 carries water at a rate of 5.0 m'/s when it is half ful. This pipe is to be replaced by a new smooth pipe with a Manning coefficient of 0.012. Determine the diameter of the new pipe if it also is to flow half full with a flow rate of 5.0 m'/s Water initially flowing in the horizontal section of pipe of diameter 12.00 cm shown in the figure enters a reducing elbow of circular cross section. The angle between the horizontal pipe and the exit of the elbow is 30.0° as shown. Water enters the pipe on the left at the rate of 14.00 kg/s and is discharged to the atmosphere. The diameter of the inlet to the elbow is 12.00 em and the diameter of the outlet is 3.00 cm. The elevation difference between the center of the inlet and the center of the outlet is 30.0 cm. Neglecting the weight of the water in the elbow and treating the water as an ideal fluid, determine the a) gage pressure in the horizontal pipe at the center of the inlet to the elbow, b) magnitude(s) and direction(s) of the anchoring force(s) needed to hold the elbow in place. 6. Water from the large tank shown in Fig. 6 is pumped through a 1-in.-diameter pipe that is 300 ft long. The pipe is made of galvanized iron with e 0.0005 ft. Determine the flow rate through the pipe if the pump adds a head of 10 ft to the fluid. Neglect minor losses 30.0 cm 30.0 Elevation 14ft Elevation 6ft Lenath 3ooft 1inch Galvanized,ron 9

Answer 1

(2)(32-2)·肉(h)2)2. 0025 ( Slore (s) = 0.01 s1S (32.2). (주)2 (h) heuo fife 3 ou8 (D) 2.6 rak 0 00 3342 CPA Aprly every equah m. 2 g