Understanding Water Pressure: Tips for Measuring Flow from a 250 Gallon Tank

AI Thread Summary
To determine the water pressure from a 250-gallon tank through a 3/8-inch nozzle, the key factor is the height of the water column above the nozzle. The pressure at the nozzle can be calculated using the formula p = ρgh, where ρ is the water density, g is the acceleration due to gravity, and h is the height of the water. At normal conditions, approximately 1 atm (14.7 psi) of pressure is generated for every 33 feet of height. While the nozzle size does not affect the pressure, it influences the water's exit speed. Understanding these principles allows for accurate measurement of water flow from the tank.
craxma68
Messages
1
Reaction score
0
If there is anyone out there that can answer this it would be greatly appreciated. I am stuck with this one.

At normal pressure of its own weight how can I determin the water pressure of water coming out of a 3/8ths in. nozzle out of a 250 gallon tank?
 
Physics news on Phys.org
i think that it would depend on how tall the tank is. but i am not sure of the equasioons to figure it out. i am no expert and am probably missing something.
 
Nozzle size doesn't matter. Initially you get about 1 atm (14.7psi) of pressure for every 33 feet of height, which holds until the pressure starts to significantly compress the water, but this would require a very tall tank.
 
Nozzle diameter doesn't affect the pressure, but it does affect the exit speed of the water. The pressure is only a function of the water level height above the nozzle (p=ro*g*h).
 

Thread '1:1 versus 2:1 Mechanical Advantage debate'

The rope is tied into the person (the load of 200 pounds) and the rope goes up from the person to a fixed pulley and back down to his hands. He hauls the rope to suspend himself in the air. What is the mechanical advantage of the system? The person will indeed only have to lift half of his body weight (roughly 100 pounds) because he now lessened the load by that same amount. This APPEARS to be a 2:1 because he can hold himself with half the force, but my question is: is that mechanical...
View full post »

Thread 'Average velocity as a weighted mean'

Hello everyone, Consider the problem in which a car is told to travel at 30 km/h for L kilometers and then at 60 km/h for another L kilometers. Next, you are asked to determine the average speed. My question is: although we know that the average speed in this case is the harmonic mean of the two speeds, is it also possible to state that the average speed over this 2L-kilometer stretch can be obtained as a weighted average of the two speeds? Best regards, DaTario
View full post »

Thread 'Newton's first law?'

Some physics textbook writer told me that Newton's first law applies only on bodies that feel no interactions at all. He said that if a body is on rest or moves in constant velocity, there is no external force acting on it. But I have heard another form of the law that says the net force acting on a body must be zero. This means there is interactions involved after all. So which one is correct?
View full post »

Similar threads

I Find Best Water Nozzle Type & Pressure for Longest Distance
Replies
32
Views
9K
Needing to know the pressure in a water tank
Replies
2
Views
2K
Estimation and validation of water pressure at nozzle
Replies
3
Views
2K
Pressure and Weight in Water Tank
Replies
6
Views
13K
Pressure of captured air under water
Replies
12
Views
3K
Fluid dynamics problem: Equalize the volume of water in tanks at differing heights
2
Replies
50
Views
7K
How Does Pressure Affect Dissolved Oxygen in Water Systems?
Replies
4
Views
2K
Measuring the water volume in a small tank with a manometer
Replies
26
Views
2K
Gas (DO) saturation under pressure in water
Replies
2
Views
2K
Calculate Pressure & Speed of Submerged Water Jet 100mm Away
Replies
3
Views
3K

Hot Threads

Recent Insights

Back
Top