Q.

Water is falling down at the rate of 1.8 Kg per minute from a vetical tube. The radius at the bottom of the tube is 0.004 m and pressure around it is 0.76m of Hg. The diameter of the tube at a height of 0.5 m from the bottom is 0.005 m. find the pressure at that point.

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a

0.724 m of Hg

b

0.824 m of Hg

c

0.924 m of Hg

d

0.624 m of Hg

answer is A.

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Detailed Solution

P1−P2=ρ2(v22−v12) vt=mρt=1.860×103=A1V11.860×103=π×(0.004)22×v1A2V2=1.860×103π(0.0052)2v2=1.860×1030.76−P2=1032[v22−v12]P2=0.724m  of Hg
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Water is falling down at the rate of 1.8 Kg per minute from a vetical tube. The radius at the bottom of the tube is 0.004 m and pressure around it is 0.76m of Hg. The diameter of the tube at a height of 0.5 m from the bottom is 0.005 m. find the pressure at that point.