Question

A manometer connected to a closed tap and a pressure reading of 4.5x105 N / m2, when the tap is opened, the manometer reading changes to 4.0x105 N / m2, so the velocity of the water flow is: water density = 1000 kg / m3) /)

a)7m/s b)8m/s c) 9m/s d) 10m/s

Answer 1

We will be solving this problem using Bernoulli's Theorem given by,

  

As Water starts flowing the pressure decreases .

Here

P- Pressure of the liquid

- Density of Water

v - Velocity of Water

Given :

P₁= 4.5 x 10⁵N/m² , P₂= 4.0 x 10⁵ N/m² , = 10³ kg/m³

Therefore the right answer is Option D 10 m/s

Hope this Helps!!