Water flows through a valve with inlet and outlet velocities of 3 m/s. If the loss coefficient of the valve is 2.0, and the specific weight of water is 9800 N/m3, the pressure drop across the valve is most nearly:

The value is

Explanation:

From the question we are told that

    The inlet and outlet velocity is

     The  loss coefficient is  

      Th specific weight of water  is  

Generally the pressure drop across the valve is mathematically represented as

Here   is the density which is mathematically represented as

=>    

=>  

So