A constant diameter tube (2 cm) is used to siphon water from the tank as shown.

Question

A constant diameter tube (2 cm) is used to siphon water from the tank as shown. Calculate the flow rate, Q, from the tank and the pressures at points (a), (b), and (c). State all assumptions. Use of any communications device having wireless capability is forbidden. A constant diameter tube (2 cm) is used to siphon water from the tank as shown. Calculate the flow rate, Q, from the tank and the pressures at points (a), (b), and (c). State all assumptions. Use of any communications device having wifeless capability is forbidden.

Explanation / Answer

Using bernaullis principal bw the top of the water surface in tank and end of pipe Pa + 0 + rho g * 2 = pa + 1/2 rho v2 Solving v = 6.26 m/s So flow rate = 6.26 * pi * 0.02^2/4 = 1.97 e-3 m3/s Now bernauli principal between top surface and point A or C Pa + 0 + 0 = P + 1/2 rho v2 So pressure at A and C is = p = 81700 pa Use bernaullis principle bw top surface and B Pa +0 + 0 = P + 1/2 rho v2 + rho g * 1.4 So pressure at B = 67980 pa

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