Pressure Demo: Water Column

This is a demonstration that pressure increases with depth in a column of water. The demonstration is carried out by filling a graduated cylinder that has three side openings with water, and observing the speed with which the water exits through the three openings.

This demonstration was created at Utah State University by Professor Boyd F. Edwards, assisted by James Coburn (demonstration specialist), David Evans (videography), and Rebecca Whitney (closed captions), with support from Jan Sojka, Physics Department Head, and Robert Wagner, Executive Vice Provost and Dean of Academic and Instructional Services.

[lusionn]

If your science teacher asked you to watch this video

[polarunion]

Thank you for jumping between all of the units of measurement!

[neodiy]

Good experiment --- this helps me with my project to install higher tank on the shower unit to help increase the pressure

[physicsAZ]

Please try to open all three stoppers concurrently. It adds to the effect.

[eco-enjoyer]

Here because of Titanic submersible implosion, prayers to all victims.

[mddelman]

Do you have time to answer a question for me? I have a cylinder filled with water, There's a small hole in the top that I can open and close. There's a hole in the bottom that I can open and close, just to control whether or not water is released. If both holes are closed, obviously no water is released. If the cylinder is filled to the top and I open the bottom hole, no water is released until I open the hole at the top. If I open the top hole very briefly, some water is released but stops very quickly after I close the hole at the top. If the cylinder is only two-thirds full, the flow continues for a longer amount of time after I close the top hole. If it's one-third full, it takes an even longer time to stop flowing. Can you tell me why it works this way? I'd be most appreciative if you can answer this question. Thanks very much!

[jtoker]

That would make a pretty sweet water bong there Professor.

[heinerknallinger]

Thank you.
Why do these videos always stop at when it's getting really interesting? 😉
What would be the next step is - imho - how do the holes effect the stream so that e.g. all three streams can flow parallely?
And how much water do they emit so I know how much water had to be reinserted constantly to keep the initial level of water and therefore the initial level of pressure on each hole.
I know, I am asking for a lot. But I really want to know! 🙂

Also I would have like to see what happens initially, if there was a constant supply water fill. Because, it seems that all three streams hit the exact same point in the sink at their initial emission. Is this true? Simply to gravity? I doubt it, but I would like to have known.

And why do you just "describe the formula" but do not show it - at least in the description? I would find this a necessary addition to make the video complete.

[risabhpandey]

Is it at the mid point (hole) has rage more in compare to other?

[variousarts]

Can you tell me the name of the apparatus.

[mysha]

Here because my teacher told me to watch this :)

[amirulaiman]

How can i measure the velocity of the water while it flows out

[hansghana]

i would like to download ur video for my physics class

[vedam]

yall here cus of yalls physics teacher innit😭

[HrSamstag]

Video is 1:45. Until 1:25 we hear in different variations that the deeper (nearer to the earth’s gravity center) the water goes, the higher the pressure gets. It’s the same with air btw. Nice video, but much to much teacher.

[natashathresa]

Well I was attending my online class my teacher told me to watch this video

[zaminkhan]

Without of wasting water experiment could be done.

[nur]

what is the volume of the graduated cylinder and the mass? or (density)

[anilkumarsharma]

All the American🇺🇸 following👌 me for universe🌌 better place to💧 live
Where atmospheric pressure is source of energy⚡ and nature🌿🍃 become the way of life 👌👌👌👌