Question: 13. (a) Room-temperature water flows between two reservoirs through two cast-iron pipes that are connected in series, as shown in Fig. P1-13. The entrance, exit,

13.

(a) Room-temperature water flows between two reservoirs through two cast-iron pipes that are connected in series, as shown in Fig. P1-13. The entrance, exit, and pipe interface are sharp edged. Including minor losses, calculate the flow rate. The free surface of the water in tank A is 20 m higher than that of tank B.

Tank A Tank B Pipe 2 Pipe 1 L₁ = 7.5 m D₁ = 25 mm L2=7.5 m D₂ = 50 mm FIGURE P1-13

(b) Repeat part

(a) for the case where line 2 is followed by line 1. How much does the flow rate change?

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