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Q.

An L-shaped glass tube is just immersed in flowing water such that its opening is pointing against flowing water. If the speed of water current is v, then:

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a

the water in the tube rises to heightu22g

b

the water in the tube rises to height g/2u2

c

the water in the tube does not rise at all

d

none of the above

answer is A.

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Detailed Solution

KE per unit volume = PE per unit volume12ρu2=ρgh ⇒     h=u22g
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