Question

The pressure of water in a water pipe when tap is opened and closed in respectively $3\times {10}^{5}N/m^2$ and $3.5\times {10}^{5}N/m^2$. Determine the velocity of flow when tap is open?

• A. $10m/s$
• B. $5m/s$
• C. $20m/s$
• D. $15m/s$

Answer 1

The correct option is A $10m/s$

$\Delta P=\frac{1}{2}\rho v^2(0.5\times {10}^5)=\frac{1}{2}\times 1000\times v^{2}v=10m/s$