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  • The pressure of water in a pipe when tap is closed is . When tap ge

The pressure of water in a pipe when tap is closed is 5.5\times10^{-5} N/m^2. When tap gets open, pressure reduces to 5.\times10^{5} N/m^2. The velocity with water comes out on opening the tap is-

Option: 1

10 m/s


Option: 2

5 m/s


Option: 3

20 m/s


Option: 4

15 m/s


Answers (1)

best_answer

Decrease in pressure energy = Increase in K.E 

\begin{aligned} & \Delta \rho=\frac{1}{2} \rho v^2 \\ \therefore \quad & v=\sqrt{\frac{2(\Delta \rho)}{\rho}}=\sqrt{\frac{2 \times 0.5 \times 10^5}{10^3}} \end{aligned}

        v = 10 m/s

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Ritika Harsh

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