# Physics

posted by .

Water flows at 12 m/s in a horizontal pipe with a pressure of 3.0 x 10 4 N/m2 . If the pipe widens to twice its original radius, what is the pressure in the wider section?

• Physics -

The water speed will drop by a factor 1/4 because of the larger pipe area. That follows from the incompressible fluid continuity equation, V * Area = constant. The water speed in the wider section is 3 m/s

Use the change in velocity and the Bernoulli equation to get the change in pressure.
P + (1/2)(density) V^2 = constant

P2 - P1 = (1/2)(water density)(V1^2 - V2^2

Solve for P2.

• Physics -

xas

## Similar Questions

1. ### physics

Water flows in a cylindrical, horizontal pipe. As the pipe widens to twice its initial diameter the pressure in the pipe changes. Calculate the change in pressure between the wide and narrow regions of the pipe. Give your answer as …
2. ### Physics

Water at a pressure of 400,000Pa flows through a horizontal pipe at a speed of 1.50 m/s. The pipe narrows to 1/8 its original diameter. What is the flow speed through the narrow section?
3. ### physics

water moving in a horizontal pipe has a velocity of 9 m/s when the radius of the pipe os 0.025m. Determine the velocity of the water when it enters a wider section of the pipe and the radius is 0.075m.
4. ### computers

1. Water at a pressure of 3.00 x 10 5th Pa flows through a horizontal pipe at a speed of 1.00 m/s. The pipe narrows to one-fourth its original diameter. What is the speed of the flow in the narrow section?
5. ### Physic

1. Water at a pressure of 3.00 x 10 5th Pa flows through a horizontal pipe at a speed of 1.00 m/s. The pipe narrows to one-fourth its original diameter. What is the speed of the flow in the narrow section?
6. ### physics

Water is flowing into a factory in a horizontal pipe with a radius of 0.0223 m at ground level. This pipe is then connected to another horizontal pipe with a radius of 0.0400 m on a floor of the factory that is 10.6 m higher. The connection …
7. ### Physics

Water flows horizontally in a tapered pipe at a rate of 500 m^3/h. The area at one section of the pipe is 6500 mm² and 4000 mm² at another section. Calculate the gauge pressure at the larger section if the pressure at the smaller …
8. ### physics

Freshwater (𝜌 = 1,020 kg/m3) is flowing in a horizontal pipe whose cross section widens from 9.0 cm2 to 13.0 cm2. The water speed at the wide section of the pipe is 1.25 m/s. What pressure difference (absolute value) is there …
9. ### physics

Freshwater (𝜌 = 1,020 kg/m3) is flowing in a horizontal pipe whose cross section widens from 9.0 cm2 to 13.0 cm2. The water speed at the wide section of the pipe is 1.25 m/s. What pressure difference (absolute value) is there …
10. ### physics

The pressure in a section of horizontal pipe with a diameter of 2 cm is 143 kPa. Water flows through the pipe at 2.80 L/ s. If the pressure at a certain point is to be reduced to 103 kPa by constricting a section of the pipe, what …

More Similar Questions