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in Fluid Mechanics by (118k points)
If a liquid enters a pipe of diameter d with a velocity v, what will it’s velocity at the exit if the diameter reduces to 0.5d?

(a) v

(b) 0.5v

(c) 2v

(d) 4v

I had been asked this question in final exam.

The question is from Continuity Equation in chapter Kinematics of Flow and Ideal Flow of Fluid Mechanics

1 Answer

+2 votes
by (362k points)
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Best answer
Right choice is (d) 4v

Easy explanation: According to the Continuity Equation,

where a represents flow area, v represents flow velocity, i is for inlet conditions and o is for outlet conditions.

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