Question

A small branching pipe system distributes water to three holding tanks. Pipe 1 contains a valve that is partly closed that limits the flow rate to 1.0 cfs with a valve head loss of 3.60.

Answer 1

The pressure at the entrance of the water main drops as the flow rate decreases. To find the new pressure, use Bernoulli's equation.

Step-by-step explanation:

According to Bernoulli's equation, the pressure at a given point is inversely proportional to the flow rate of a fluid. In this case, as the flow rate decreases from 200 L/min to 8.00 L/min, the pressure at the entrance of the water main drops as well. To find the new pressure, you can use the equation:

P1V1 = P2V2

where P1 and V1 are the initial pressure and flow rate, and P2 and V2 are the final pressure and flow rate. Plug in the values given and solve for P2.