Calculating Friction Force, Mass and Gauge Pressure in an Emergency Tank

AI Thread Summary
The discussion focuses on calculating the friction force, mass flow, and gauge pressure related to a water tank system. It involves a tank with a hose and nozzle setup, where the friction force on a stopper is determined by the pressure head of the water. Bernoulli's equation is recommended for these calculations, particularly to analyze the relationship between pressure and flow. The gauge pressure is defined as the absolute pressure minus atmospheric pressure. Accurate calculations are essential for understanding the dynamics of water flow in emergency situations.
jenha14
Messages
11
Reaction score
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?
 
Physics news on Phys.org
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.
 

Thread 'Rolling without slipping on a curved surface'

Kindly see the attached pdf. My attempt to solve it, is in it. I'm wondering if my solution is right. My idea is this: At any point of time, the ball may be assumed to be at an incline which is at an angle of θ(kindly see both the pics in the pdf file). The value of θ will continuously change and so will the value of friction. I'm not able to figure out, why my solution is wrong, if it is wrong .
View full post »
Thread 'Voltmeter readings for this circuit with switches'

Thread 'Voltmeter readings for this circuit with switches'

TL;DR Summary: I would like to know the voltmeter readings on the two resistors separately in the picture in the following cases , When one of the keys is closed When both of them are opened (Knowing that the battery has negligible internal resistance) My thoughts for the first case , one of them must be 12 volt while the other is 0 The second case we'll I think both voltmeter readings should be 12 volt since they are both parallel to the battery and they involve the key within what the...
View full post »
Thread 'Trying to understand the logic behind adding vectors with an angle between them'

Thread 'Trying to understand the logic behind adding vectors with an angle between them'

My initial calculation was to subtract V1 from V2 to show that from the perspective of the second aircraft the first one is -300km/h. So i checked with ChatGPT and it said I cant just subtract them because I have an angle between them. So I dont understand the reasoning of it. Like why should a velocity be dependent on an angle? I was thinking about how it would look like if the planes where parallel to each other, and then how it look like if one is turning away and I dont see it. Since...
View full post »

Similar threads

Bernoulli’s Equation and External Forces
Replies
4
Views
2K
Bernoulli, Gauge pressure in hose?
Replies
4
Views
8K
What Is the Gauge Pressure in the Hose Just Behind the Nozzle?
Replies
2
Views
14K
Calculating Force to Push Steel Rod Up 50 cm
Replies
24
Views
3K
Force required to hold a fire hose
Replies
13
Views
19K
I Find Best Water Nozzle Type & Pressure for Longest Distance
Replies
32
Views
9K
Calculating Water Volume in a Tank Using Pressure Measurements
2
Replies
61
Views
6K
Force of pressurized water exiting a hose or pipe?
Replies
20
Views
10K
Fluid statics - two water tanks
Replies
6
Views
3K
Calculating the force from a pump + nozzle system
Replies
6
Views
3K

Hot Threads

Recent Insights

Back
Top