• Support PF! Buy your school textbooks, materials and every day products Here!

Gauge Pressure

  • Thread starter jenha14
  • Start date
11
0
A village maintains a large tank with an open top, containing water for emergencies. The water can drain from the tank through a hose of diameter 6.15 cm. The hose ends with a nozzle of diameter 2.35 cm. A rubber stopper is inserted into the nozzle. The water level in the tank is kept 7.50 m above the nozzle.
(a) Calculate the friction force exerted by the nozzle on the stopper.
(b) The stopper is removed. What mass of water flows from the nozzle in 2.00 h?
(c) Calculate the gauge pressure of the flowing water in the hose just behind the nozzle.


Do I need to use Bernoulli's eqution?
 

Astronuc

Staff Emeritus
Science Advisor
18,547
1,682
If friction holds the stopper in the nozzle, then the friction force must equal the force of the water, i.e. the pressure head.

Yes, use Bernoulli's equation.

The gauge pressure is just the absolute pressure minus the atmospheric pressure.
 

Related Threads for: Gauge Pressure

  • Last Post
Replies
8
Views
4K
  • Last Post
Replies
1
Views
2K
  • Last Post
Replies
2
Views
3K
  • Last Post
Replies
9
Views
4K
  • Last Post
Replies
2
Views
3K
Replies
2
Views
728
  • Last Post
Replies
1
Views
1K
  • Last Post
Replies
1
Views
3K
Top