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Q.

An L-shaped tube with a small orifice is held in a water stream as shown in fig. The upper end of the tube is 10.6 cm above the surface of water. What will be the height of the jet of water coming from the orifice? Velocity of water stream is 2.45 m/s

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a

Zero

b

20.8 cm

c

10.6 cm

d

40.0 cm

answer is B.

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Detailed Solution

According to Bernoulli's theorem,  h=v22g  ⇒h=(2.45)22×10=0.314=31.4 cm∴ Height of jet coming from orifice =31.4−10.6=20.8 cm
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