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The reading of pressure meter attached w...

The reading of pressure meter attached with a closed pipe is `3.5 xx 10^(5)Nm^(-2)`. On opening the value of the pipe, the reading of the pressure meter is reduced to `3.0 xx 10^(5) Nm^(-2)`. Calculate the speed of the water flowing in the pipe.

A

10 cm/s

B

10 m/s

C

0.1 m/s

D

0.1 cm/s

Text Solution

Verified by Experts

The correct Answer is:
B
`(P_(1))/(rho)+(1)/(2)v_(1)^(2)=(P_(2))/(rho)+(1)/(2)v_(2)^(2)`
`P_(1)-P_(2)=(1)/(2)rho(v_(2)^(2)-v_(1)^(2))(because v_(1)=0)`
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