Q. 18

# Water enters through end A with a speed u1 and leaves through end B with a speed u2 of a cylindrical tube AB. The tube is always completely filled with water. In case I the tube is horizontal, in case II it is vertical with the end A upward and in case III it is vertical with the end B upward. We have v1 = v2 forA. case IB. case IIC. case IIID. each case

From the equation of continuity, the volume of water entering should be equal to the volume leaving. As the cross-sectional area(A) is same in all three cases, from , in all three cases.

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