The best part of this video was keeping in the mistakes, and showing that science isn't always perfect before it goes into the textbooks.
@davidevans3227
2 жыл бұрын
ur right, how many discoveries were/ are made through mistakes accidents etc.. it is very good and unusual of them to show this isn it..
@jackmclane1826
Жыл бұрын
Well... The water being pushed back was interesting, although the real reason was not explained. The liquid compressed the air that was inside the hose. So far, so correct. But the the liquid starts to flow down the edge of the hose while the air moves up slowly. At some point the water above the hose was not enough to keep the compression on the air. Others were a little amateurish, too. Like a hose plopping off a barb in a demonstration of how strong pressure is... duh!
@ncdave4life
Жыл бұрын
The best part was the clapping toddler at 6:02
@Iirichil73
Жыл бұрын
Science is perfect, execution of theory is usually faulted
@estwald555
Жыл бұрын
I found another aspect of this video to be the best part.
@msg308
11 ай бұрын
Another way to think about pressure depending on only the height of the water is to go to the edge of a lake, dig a small hole, make a channel connecting the two that's only a few centimeters deep, and then try damming that channel with your hand. The force of the water you're trying to hold back will feel negligible, even though there's a massive amount of water on the lake's side.
@BrownMInc
10 ай бұрын
holy this is a GREAT analogy for dams. Thanks for sharing!
@procrastmh
8 жыл бұрын
This was the only video I found about the topic. Thanks!
@friendsbrn
Жыл бұрын
Great demo! Honestly though, I think my favorite part was the bit about the technical challenges of this experiment - thank you so much for including that.
@hindugoat2302
Жыл бұрын
wait all the pressure on the dam wall comes from the height alone? a narrow strip of water has the same pressure ?? what about the weight of all the water behind it, what holds that back?
@savage22bolt32
Жыл бұрын
@@hindugoat2302 think of your body. Your weight is felt on the bottom of your feet, not the sides of your legs, back, chest etc.
@hindugoat2302
Жыл бұрын
but a body is solid not fluid. @@savage22bolt32
@fargo007
Жыл бұрын
I love this professor. She's great and I can see how much fun it would be to learn in her class.
@Madnikodemus2
3 жыл бұрын
Fantastic experiment. That’s a real teacher right there.
@Chrisjude100
Жыл бұрын
And it does no harm that she's a dish!
@DanildFlamme
Жыл бұрын
That is so cool... I knew the physics of it, and understood that it should work, but it is still REALLY fascinating to see that thin tube of water breaking that big glass, purely because of the height of the water "column".
@rww805
Жыл бұрын
Shame that titan sub guy didn't watch this
@davefoc
Жыл бұрын
I also understood that it should work but I wasn't sure how to actually do it. I wasn't sure there was plastic tubing that was strong enough (there is, I found some nylon tubing rated at 800 psi) or how to prevent bubbles from blocking the flow. I had various complicated ideas but adding soap wasn't one of them. Well done to whoever thought of that. One of my ideas was to suck the air out of the tube. Obviously more complicated than soap but I think that might have worked also.
@DanildFlamme
Жыл бұрын
@@davefoc Yeah, it seems like she did indeed end up at on of the simpler solutions for it. No matter which alternate solution I have thought of, they all end up being more complicated than the one she chose.
@inyobill
Жыл бұрын
@@DanildFlamme It's normally easier to design a complex solution. Elegant solutions take more thought.
@DanildFlamme
Жыл бұрын
@@inyobill That's true... I guess that also says something about the politicians who makes a mess with super-complex laws 😆.
@MottiShneor
Жыл бұрын
A really GOOD demonstration of a physical law/property. You can learn Pascal's law a hundred times, and even pass exams using it and its mathematical equations - but this short explanation followed by a pin-point "query to Mother Nature" with such a thin - even flexible tube, and so little extra water - will really do the job. People who watched this video will have the fact and physical law "nailed down" in their heads, part of their future intuition. I admit to have been surprised, despite my BSc. in physics (ok, from 40 years ago...) my Intuition had it that the AMOUNT of water (hence its weight) had to do with the hydrostatic pressure. I really needed that reminder of Pascal's law and its meaning. I learned something here. Thank you.
@Marcosticks
3 жыл бұрын
When you search the world for something that someone should have done long ago (and documented), but you find nothing... then you know you have got a gem. Cool video. I admire your perseverance.
@eljefeamericano4308
2 жыл бұрын
Thanks for going to all of the trouble to make this demonstration! It's great to actually see a lesson, and not just learn it and accept it's probably true.
@sleepingwarrior4618
Жыл бұрын
Wait till you find out that gravity doesn't exist and the reason stuff falls and rises is because of the medium. #MindBlown
@cryptokids3760
Жыл бұрын
I think the tube can also only be so long as the water at the top can boil due to pressure.. let me know if I’m missing anything
@eljefeamericano4308
Жыл бұрын
@@cryptokids3760 I know what you're talking about, but that also requires a vacuum to be present at the top of the tube.
@jadneves
Жыл бұрын
Gostaria de ver a experiência invertida para uma descompressão abissal pois um tubo chegando às Fossas Marianas por exemplo deveria fazer jorrar água na superfície porque com o tubo não há a compressão lateral; caso positivo podemos projetar para esse fluxo uma usina elétrica;
@TheJagjr4450
Жыл бұрын
I enjoy hearing her lectures and experiments, her voice is very pleasing to the ear.
@stepbystepscience
3 жыл бұрын
Amazing, thanks so much for doing this and then sharing it with the world.
@clairecelestin8437
Жыл бұрын
I'm really glad you had the foresight to dye the water in the tube. Notice that as soon as the vessel fails, it starts to fall, and the top of the vessel accelerates downwards at the expected 1 g. However, blue water immediately sprays in even faster than a simple 1 g acceleration from gravity could allow. This shows that the water has forces acting on it other than simple gravity- in particular, the spring-like elastic deformation of the tubing, and to some degree, the water itself (even though water is carelessly described as "incompressible", it does actually compress a very small amount). Without these forces, the top of the vessel and the blue water would have accelerated at the same rate and we would not have seen the blue puff.
@gibbogle
Жыл бұрын
There is no 1 g acceleration. The barrel expands slightly before it bursts, admitting some blue water.
@clairecelestin8437
Жыл бұрын
@@gibbogleTry watching it at 0.25 speed from about 5:10. The glass breaks before any of the blue water injects in.
@poleguy
Жыл бұрын
They don't mention it, but it's clear the person at the top of the tower is providing a good amount of pressure from the top of the tube with the syringe. They are pushing quite hard. This is technically "cheating" as it adds to the force of gravity in the tube. To really prove that it's "just" the height, you'd need to have an open tube. Bleeding the air from the bottom as you fill the tube would be a good idea too. Just add a small bleeder valve.
@flintsmith4771
Жыл бұрын
@@poleguy The syringe isn't sealed to the tube, so she isn't adding pressure directly.
@flintsmith4771
Жыл бұрын
I don't think you have to go to those effects to explain your observation. When the carboy bursts, the internal pressure drops to zero while the water in the tube is still at 43PSI so it squirts into the falling water just as it would into an open bucket.
@mrthingy9072
Жыл бұрын
I wish we'd had experiments like this when I was in high school (a long time ago). Seeing physics and mathematics in action really helps.
@georgen9755
Жыл бұрын
so it implies we are not in high school delivery a laboratory demonstration it is much higher level to do this kinda of experiment ...which none of our polytechnics permit the physics lab or civil engineering laboratory to demonstrate that height matters . As we take a deep dive in the water pressure builds in all directions ...and oxygen depletes and similarly if you go to hill stations the atmospheric pressure decreases with height depleting oxygen. oxygen is so crucial for deep diving or sky divers jumping from a height . limiting oxygen supply at high altitude can cause exhaustion and breathing problems. There has been shortage of air supply at greater heights. I am neither manufacturer of oxygen or supplying oxygen and paying bills as high as these can be intercepted by higher authorities as I have no authorization whatsoever for conducting ....fluid mechanics or physics of UTM ..... How am I answerable when I am not authorized on such issues besides the rubber stamps with seal and signature with the physics /chemistry/civil HOD English Dept ? only God knows ? Vice president academics ? admission academics ? whosoever concerned for admission ?
@ianmaslen1920
Жыл бұрын
I don't know who your high school physics teacher was, but as a public school teacher myself I can tell you it's not that teacher don't want to do a demonstration like this, it's we often don't have the resources -- that why this was done at a university -- deeper pockets.
@stomp1691
5 жыл бұрын
The only demonstration i could find online... Thank you!
@maini51
Жыл бұрын
Super very nicely explained and demonstrated. This type of videos should be shown in schools.
@宇戸名地味朗
Жыл бұрын
Now I know excitement is another word for science. Thank you doctor.
@philip6508
Жыл бұрын
Great experiment and very well executed! You did a good job dealing with all the challenges.
@A.J.1656
Жыл бұрын
I did a similar experiment the other direction. I dove into the deep end with the long pole we used to vacuum the pool. I put my hand over the tube so it wouldn't fill with water, then once at the bottom, I put my mouth on the end of the pole thinking it would work like a long snorkel. It almost sucked my lungs inside-out. Lol
@BrownMInc
10 ай бұрын
Glad you're alright, you basically made a barometer with that set up. Lower pressure atmosphere compared to the pressure created by the depth of the water
@stevenpurtee9774
4 жыл бұрын
I've been using this video in my Physics with Calc college class for a few years. Now I'm going further and using it as a Canvas video quiz.
@jamesforgington3315
Жыл бұрын
I’ve never been so enthralled by an educational demonstration in my life
@Daft_Dhwelk
Жыл бұрын
Nice demonstration of hydrostatic pressure. P= density x gravitational force x height I teach Physics to Anesthesiology students. That Hoover dam explanation was epic. I never realized that aspect. I learned something new today.
@savage22bolt32
Жыл бұрын
This answered the question I asked when I was in grade school back in the 1950's. So cool to see this. Perhaps I should have done my homework in high school...
@danl.4743
3 жыл бұрын
My thumb up is for this teacher. Because she is awesome!
@pranavkishore9526
6 жыл бұрын
You are a great teacher and it would be so awesome if had more such amazing content of your channel.
@BeatrixDenise
3 жыл бұрын
I don't know why this made me cry but thank you for this video. I couldn't find any other video about this specific experiment that Pascal did. Also, I am inspired that you are a woman in STEM.
@pyrochemist
7 жыл бұрын
What about a slight alteration to the demonstration? Pre-fill the tube (above the mouth of the jar) and just raise it up to show how it's only the height that matters.
@Physics4Life
7 жыл бұрын
Yes, that would work as well!
@muhammadshoaib8854
7 жыл бұрын
PyroChemist you are right why she did this.i dont believe that it works if we fill water before.because she is producing more pressure by pressing water there for the container broke
@debendragurung3033
6 жыл бұрын
thats brilliant. that way u dont need to worry about all the surface tension.
@anilkumarsharma1205
4 жыл бұрын
@@Physics4Life are you able to give electricity by using the atmospheric pressure changing by using the hydraulic pressure setup we use a long inverted test tube made of magnet and mercury and glass and copper wire coiled around the glass test tube filled with mercury and magnet neodymium magnet floating inside the tube we put all this setup inside the vacuum chamber and use hydrologic hydraulic pressure setup so we slightly changing pressure and it will provide momentum to many thousand magnet floating inside the vacuum chamber and give electricity so we got a simple electricity production units
@nawaz_99
3 жыл бұрын
@@derek8541 It's not air pressure from the tiny syringe, it's additional hydraulic pressure being exherted on the glass container.
@helmutzollner5496
Жыл бұрын
Wow! This is a great demo. I had known that only the hight is the determining parameter, but I had not viscerally internalized that fact. Never realized that the water pressure of a hose would suffice to generate the pressure to destroy a vessel. Welldone! Excellent visualization. Thank you!
@demetriusmds
4 жыл бұрын
Congratulations. Very nice experiment. Specially because of what was not hidden under the rug. I will use it with my students here in Brazil. Thanks!
@PakiNewsNetwork
Жыл бұрын
That teacher is also breathtaking.
@abietawil3271
7 жыл бұрын
Why didn't the hydrostatic pressure burst the tube near the bottom. If it was able to break the glass, shouldn't it have been able to burst the plastic tubing?
@Physics4Life
7 жыл бұрын
Great question! The tube is actually much stronger than the glass - it is made out of a flexible polymer which is manufactured for strength and durability. We chose this strong tubing specifically so it would have a much higher pressure threshold than the glass, all part of the preliminary testing stages.
@GreenDartGoblin
3 жыл бұрын
Volcanoes erupt where the earth is weaker
@moonpiespotlight4759
Жыл бұрын
Because the large container wasn't super strong. The additional pressure was the straw that broke the camel's back.
@wardeggerrobertmarius144
Ай бұрын
1 - The pressure is at its highest at the bottom of the barrel. 2 - To break an object you need to apply a force that overcomes the forces that bound the atoms 😂 So p=F/A that means F=p*A😂 So if you have the same pressure on two containers the one that has bigger surfaces would be subjected to a higher force 😂😂😂 So, that makes a smaller container capable of handling higher pressures than a larger one even if they are built from the same material and have the same thickness of the walls 😂 3 - Increasing thickness of the walls makes a container capable of handling higher pressure 😂 that one with thinner walls even if they would have the same volume and are built from the same material 😂 4 - Most wrongly believe that the pressure is the same in all directions 😂 Completely false 😂 This is a little harder to grasp... Presure is caused by the atomic forces trying to reach a state of equilibrium... In short there is a specific distance that atoms like to keep from each other 😂 If you squeeze them they push back 😂 with the same force in any direction trying to get the space they like. 🤣🤣🤣 That means the presure is higher on the walls that have a smaller area even inside the same container... Now all this makes that a container that has a big length compared with its section area will actually have less pressure on the long walls than on the short ones... In other words in pipes with smaller diameter the pressure would be smaller on the transversal walls than on the walls on the ends of it. That means a tube that allows fluid to flow through it can handle a higher pressure if it has a smaller diameter. And that's why the barrel breaks but not the hose. I bet the barrel would break even if the barrel and the hose would be built from the same material. 😂😂😂 Sorry for you... It's good to make since teaching fun, but too much circus distracts the attention from reality... Sorry for you all, but physics can't be truly learned before learning enough math... This world is just a big freak show 😂😂😂😂 Ps Consider how much pressure can handle a small aluminum beer can that has transversal walls thinner than 1mm😂😂 and the bottom is curbed towards inside to increase its surface 😂😂😂😂 Worse than not knowing/understanding something is to be convinced you know/understand when you don't. Even worse is to teach others wrong. This world is a big mess... I wonder 🤔 why 😂😂😂😂
@OneOfEightBillion
Ай бұрын
@@wardeggerrobertmarius144 you need help
@billakins3543
Жыл бұрын
What a great teacher!
@marklenfestey6930
5 жыл бұрын
You are my hero! I've always wanted a video of this experiment but no matter how hard I've tried I could never find one. It is also interesting to hear that perhaps Blaise didn't actually perform the experiment. I prefer to think of that as sour grapes from people like me who couldn't do it themselves because of all the obstacles that would have to be overcome.
@davidevans3227
2 жыл бұрын
i am listening to a radio program about Pascal right now and i wondered if this experiment was here.. i can't believe it! ..fantastic, thankyou for doing this 🙂 x
@endtimeawakening5557
2 жыл бұрын
Awesome idea for a channel. Hands-on showing students how science really works. Thanks for sharing!!!
@williamogilvie6909
Жыл бұрын
Incredible demo. Thank you for resurrecting that experiment.
@atharvat223
7 жыл бұрын
wow,looking forward for other videos as well
@kanchansarkar7870
Жыл бұрын
It was demonstrated in my class and my student took it as well as a science experiment and fun. This is the great demonstration I have ever seen! Thanks to the authorities especially to the science teacher.
@sarthakvijay214
8 жыл бұрын
An excellent demonstration!
@milos_nikolic
8 жыл бұрын
Wow, this is amazing. I'm looking forward to the next videos!
@dilipdas5777
2 жыл бұрын
One of the best Physics videos in you tube
@FarawayGeorge
3 жыл бұрын
Thanks for an excellent demonstration (and the follow-up explanation video) but equally for making into reality what was by all accounts just a thought-experiment before. Absolutely pioneering stuff and think this should be called the Visnjic barrel experiment, not the Pascal barrel, since all he did was sit in his dusty lab drawing it out instead of getting up there and inspiring people. I remember hearing about this when I took fluid mechanics as a course at uni decades ago, and I just couldn't accept what I was being told because it sounded so ridiclous....in the end I failed the class mainly because I hadn't developed the intuitive stuff that your experiment provides. The setup and execution of this was very impressive and while I did have the same confusion as a few others in that it appeared there might have been an air-tight seal between the syringe and the pipe, which had me scratching my head a bit, and this was partly obscured by the pressure gauge in the corner, I read a couple of other things about the experiment to understand what you were doing. This could of course be quickly clarified in the audio track although I imagine you are very busy. It is always fashionable for people to get excited about the latest technologies and developments but without a grasp of these basic physical things, no one can hope to understand them. By doing these clear and spectacular demonstrations you are helping to stem the tide of terrible pseudoscience and conspiracy that can only thrive when the basics are skipped and scientific terms are thrown around without knowledge of what they mean. It's absolutely vital work that you are doing and your enthusiasm is contagious. I also would like to add that I am disgusted at some of the dreadful sexist comments people have made on this video and it is truly shameful that you should have to put up with this, as you no doubt do throughout your career. Anyway, congratulations on this and no doubt many other future successes!
@bodlouk7011
2 жыл бұрын
Imagine saying that Pascal didn't inspire people. Just read what Nietzsche had to say about him.
@murrayandru7527
Жыл бұрын
Wish I had had teachers like that who could Teach a lesson and keep ALL interested ...
@gibbogle
Жыл бұрын
It is interesting to consider that the pressure in the tube at the bottom is the same (approx) as the pressure that bursts the barrel, but the thin plastic tube can withstand it.
@johnthehillboy7369
Жыл бұрын
Yes, I would like to understand that better. Someone please explain 🙏
@flagmichael
Жыл бұрын
@@johnthehillboy7369 Glad to be of service! The pressure at the bottom of the tube is right at 1/2 psi per foot of column height. A pump at the top of a well can only draw the water up about 32 feet, because the 14.7 psi air pressure only pushes it up that far: call it 2 feet per psi or 1/2 psi per foot. The 150 foot column of water produces about 75 psi pressure at the bottom. If the tube is, say 1/2 inch in diameter, the surface area is about 1.5 (that is, pi/2) inches times the height we are worried about. That means every inch of the tube is feeling about 1.5 x 75 or about 110 lbs of pressure. The barrel at the bottom is not so lucky. It looks like it was about 2 feet (25 inches to make the numbers easy) across at the middle. Each inch of height is subjected to 25x75 psi...a bit under 2000 lbs of force per inch of height trying to tear the barrel apart. If the middle of the barrel is even 4 inches tall, that is about 8,000 lbs - *4 tons!* - of force. Glass has excellent tensile strength, but that is just too much.
@thomassiller8141
2 жыл бұрын
Thanks for this video, I show this in my class.
@logically1028
Жыл бұрын
I love it.. Pls explain other scientific laws in the same manner, as they were discovered first.. With less of modern tools and clutter, when you put it just as they were discovered, it becomes so intuitive and easy to understand... Thanks
@alphanumericskeptic
Жыл бұрын
A great teacher with intelligent ideas! Well done.
@swara5480
2 жыл бұрын
I am so proud of the team work
@htavli
Жыл бұрын
Thank you so much for doing this experiment!
@bricology
Жыл бұрын
I wish I'd had teachers like her when I was in school; I might not have turned out to be such a failure 😅
@videowatcher0975
Жыл бұрын
Don’t say failure. You are not. But I say the same thing except that I might not have turned into such a bone head.
@jaimeduncan6167
3 жыл бұрын
Best demonstration I have seen of this counterintuitive result. Clearly reality is more complex and stuff like a earthquakes will move the water in the lake. and will generate forces that are related to the mass of water..
@franklaniewski5357
3 жыл бұрын
Very Cool!! My physics teacher showed us this and it blew my socks off!!
@xuanatngo4111
9 ай бұрын
A great experiment, showing us the magic that physics brings
@Soupie62
Жыл бұрын
Reminds me of watching Professor Julius Sumner Miller on TV, when I was a child. Good memories.
@TonyCanones
Жыл бұрын
Brilliant video and demo.
@jaydevpanchal2127
3 жыл бұрын
Ma'am you are amazing!!!! I wish I could have teacher like you.
@forrestwhittington5227
2 жыл бұрын
Love this video. All good data is important. Especially observable surprises such as in take one. Fun fun.
@stanbarker3764
Жыл бұрын
Every STEM teacher should start every lecture with this quote from Adam Savage of Mythbusters. "Failure is always an option"
@sliceofbread2611
Жыл бұрын
love that you can see the soapy water flowing into the bottle while the bottle is collapsing
@TwoMarlboro
Жыл бұрын
You're a very very good teacher
@lukestockett252
Жыл бұрын
You are such a great presenter of science!
@mickblock
2 жыл бұрын
I really did think that hydrostatic pressure was a result of a combination of the width and depth of a volume of water. Amazing to be introduced to the idea that it isn't. as well as be offered proof.
@gibbogle
Жыл бұрын
The force (the weight) depends on the volume of water (F = rho*g*h*A if the tube cross-sectional area is A), but the pressure is force/area: P = F/A = rho*g*h.
@saswatsarangi6669
5 жыл бұрын
u did a lot of hard work, i didn't think this would be this hard
@josephtraverso5355
3 жыл бұрын
This demo is amazing
@JoeOvercoat
Жыл бұрын
A most excellent demonstration. I was personally curious as to how you got the water to go down the tube, where I learned that soap was the solution, but I also observed a lack of safety gear on the individual in the video, where they should be wearing some kind of retention mechanism to catch them in the event of a fall.
@oak4901
Жыл бұрын
fun and explanatory, good job...
@GuitarZombie
Жыл бұрын
I feel like I won just watching this beautiful woman's demonstration
@myhandlehasbeenmishandled
Жыл бұрын
I love all the mess. Reminds me of school when you are trying to do in front of everyone something that worked just fine at home. Syringe falling apart was where I would scream and start cussing.
@ccwoodlands1565
Жыл бұрын
Her optimism, perkiness and cuteness reminds me of Pam from “The Office”
@RedSiegfried
Жыл бұрын
This is the most interested I've ever been in a physics professor ... I mean in physics before.
@edwardbright9434
18 күн бұрын
Great job guys am glad I stayed in school 🎒 love science class
@majjood01
Жыл бұрын
Excellent demonstration very well explained! Thank you very much for the effort! really appreciated!
@CatFish107
Жыл бұрын
Cool demo, and I hope some materials students were included. Probably something to be learned about the properties of the glass, and design of the bottle, as well as pressure.
@akashagrawal8948
3 жыл бұрын
Excellent demonstration!! That's how physics is to be taught👍
@flintsmith4771
Жыл бұрын
In the US we have a new way of teaching called NGSS in which the students are meant to be much more hands-on while learning. Nation-wide standards. Unfortunately, the entire topic of gas laws, including Boyles Law, was removed from the high school curriculum despite it's being the best suited to student experimentation. Proponents state that they're not mandated and that gas laws may be included, but that's just BS. People that know the beauty of the experiments retire and newbie teachers will stick to the approved list. They had to make room for Geology because the standards require 4 science classes while actual schools only schedule 3. Geniuses in charge.
@feinstein1
4 жыл бұрын
Great demo!
@goldentortoisebeetle9741
3 жыл бұрын
This is pretty amazing, thank you 😊
@verdantpulse5185
Жыл бұрын
Demijons (the vessel destructed) are impressively thick at the neck and the bottom. They are however eggshell thin at the bottom quarter. Very nice demo.
@tsbrownie
Жыл бұрын
Great demo, have never seen it before. But the diagram with the scuba diver is wrong. As a scuba diver, free diver, and physics student, the scuba diver does NOT feel increasing pressure. BUT a free diver would.
@richarde.hormigo1361
Жыл бұрын
Wow, as scientist and diver love this experiment. Would have a bit of air on the top of the bottle and a second tube with an hydrophobic filter solved the bubble formation issue along the hose? The soap / syringe thing looks significant work and explanation to do. BTW, no idea that such a thick bottle could only handle 40 PSI, I guess is too big? I do experiments with soda bottles that can go over twice that.
@tze-ven
Жыл бұрын
In order to prevent the soap water from regurgitating back to the opening, you feed in the water slowly instead of forcing it in with the syringe. The idea is to allow the water to flow in along the side of the tube keeping its center empty so that the air can escape out as water flows down to fill in the space.
@mattmarzula
Жыл бұрын
3:44 The soap is what prevents the dyed water from coming back up by breaking the surface tension of the water. It's a 150 foot narrow tube. No matter how slowly you pour the water to travel down the inside of the tube, the surface tension from the hydrogen bonds will cause it to attract to itself and create the vapor lock. Besides, what method of filling the tube slowly along the side walls do you suggest that wouldn't take all day? Notice how the crowd dwindled waiting on the experiment in the first place. 4:48 Now imagine your drop by drop slow pour technique (that by the way is unnecessary with the addition of soap). How many people do you think would stand around for that?
@alsanamir497
Жыл бұрын
@@mattmarzula when I was starting my house closed water system with well up on the hill.I brought some water down to my house and pump water from down up the pipe with valve near well allowing air to go out.After pumping,I closed down valve ,went up ,filled few scoops of water and closed air valve on the top.Voila, system works without any pump.Thats how fountains in Peterhof's park (Russia) work without pumps since 1703.Also without much soap drama could just fill pipe on the ground and pull one end up.
@simple_fred
Жыл бұрын
In your second attempt, place a fine feed inner tube within the main tube with a gap of at least a meter (the assumed volume of the inner tube translated to the diameters of the outer tube) and the top of the water . Pulls a weak vacuum on the outer tube. The vacuum will force any air pockets to move down and fill the mini hidden reservoir that it the gap between the end of the outer tube that fixed to the vassal and the end of the inner tube.
@haipengli4769
6 жыл бұрын
Physics works! More people should see this video.
@xpxzampop
8 жыл бұрын
Great video, wonderful demo, looking forward to many more! The visual aids and explanations were very well done. I realize with the intro you probably want to strike a balance between showing the "hook" (the jug exploding) quickly and also describing the demo setup/physics learning. When what was said was: "I'm going to try to break the jug using just this amount of water" there was no mention of the part the 155 ft tube would play. Something like "... by pouring it into this 155 ft tube" would make the setup at bit more clear and focus the discussion without ruining the surprise. It was not clear to me at the point in the video when the jug shattered what exactly had been done, so it was a bit less impactful. It was clear by the end and maybe it was clear to the people present. Just a little (hopefully constructive) input.
@georgespiese7388
Жыл бұрын
Difficulties must be public. For the very reason you state! Bravo you be thinkin right. Sheesh!
@agritech802
Жыл бұрын
Great video, thanks for sharing 👍
@calvinthedestroyer
Жыл бұрын
I wish my science teachers did cool exsperiments like this
@clydesdalefan
7 жыл бұрын
In order to make this demonstration easier to perform, add the following apparatus. Just above the safety enclosure, on the thin tube, install a Tee fitting so that the tail of the T is horizontal to the ground. The other two connections to the fitting remain attached to the bottle hose and the tall building hose in the vertical orientation. This third horizontal connection would now be open to the atmosphere. Make sure the bottle and hose are filled with fluid up to the Tee Fitting. Attach a Valve to open part of the Tee Fitting. The opening of this valve can be incredibly small, even a pin hole sized opening. You will no longer need soap or glycerin in the fluid. With the Valve open, pour the fluid from the tower into the long vertical hose from the top floor. All the air in the vertical column will be expelled via the T fitting and the valve opening. Once fluid reaches the T fitting and the valve, fluid will begin to escape through the small opening in the valve. Now close the valve. Please note: for safety reasons, the valve should either be closed with a stick from a short distance or electrically via a solenoid valve.
@Physics4Life
6 жыл бұрын
We considered this option, but did not want people to think that the barrel broke because of the impact of the downward falling water. It is purely a static (i.e. not moving) effect.
@lgbfjb7160
Жыл бұрын
Expecting something to happen and "believing" that it will happen are different. Expecting comes with learning and belief should be hard to come by in true science. History has shown this.
@Somethingisntright64
Жыл бұрын
As you dive underwater (scuba) you do not feel the pressure because you are equalizing to ambient pressure. If you cannot clear (equalize) your oral/nasal passages to ambient, then yes you will feel the pressure. The same goes for lung volume using scuba, your lung volume will remain at the same volume at ambient pressure (the pressure of air you are breathing through your regulator/surrounding pressure) even if the water pressure is greater. It’s only when you breath-hold that your lungs will expand or contract. In any event, excellent presentation to demonstrate pascal’s law! I sure do miss physics class. Also, for preventing the tubing from blowing off the gauge, use a swage-lock fitting. They work well for high pressure applications.
@sachinkrakela
3 жыл бұрын
Love the way you explained everything, I would like to be your student in my next life❣️❣️❣️
@antigonemerlin
Жыл бұрын
I didn't grok the height/pressure thing until I was reminded that pressure is _force per unit area_ . That's what finally clicked for me.
@cutemiaw9433
5 жыл бұрын
Thank you so much!! You're video really help me😀 Love your channel💕💕 keep making a new video
@DB-thats-me
Жыл бұрын
I only just saw this. Great, but I have an idea for an improvement. have the pressurizing canister and long hose at ground level. Actually have canister level with top of flask. This will allow you to purge air from tube and make canister smaller. (Adds to dramatic effect)! Then slowly raise canister. BOOM! Same result, easier set up. This is not a criticism, it's what I initially thought you were going to do. Great video all the same, liked. belatedly.
@bobsmith6079
Жыл бұрын
This is a demonstration of Laplace's law that states that the wall tension of a hollow sphere or cylinder is proportional to both the pressure of its contents and its radius. Wall stress is the wall tension divided by 2 times the wall thickness. So if the tubing had been attached to glass tubing of the same size it would have survived.
@prathmeshlonkar2387
4 жыл бұрын
Greetings from India !! Excellent demonstration like never seen before !!! 😃 Really looking forward to view the upcoming videos. Dear madam, it would be really exciting to watch more such experiments on various concepts like surface tension, capillary rise, hydrostatic forces on bodies under water, buoyancy & what not !!! Regards ! 🙂
@igorsk19
6 жыл бұрын
Svaka cast g-dja Višnić
@jlpsinde
5 жыл бұрын
Very very good, thank you!
@pategustavo4392
3 жыл бұрын
I wish I had the same dedication energy as her
@tihzho
Жыл бұрын
A three way valve just above the barrel enclosure to seal the 'straw' from the glass barrel while allowing water to bleed out of the straw to purge air bubbles. When the straw is full of just water turn the valve to allow the water to enter the glass barrel.
@Greg_Chase
Жыл бұрын
The same principle - Pascal's Law - is the basis for how hydraulic devices work: 1) the hydraulic jack in an auto repair shop that only requires a small amount of hydraulic fluid to lift the car 2) hydraulic brakes in a vehicle, where only a tiny amount of hydraulic fluid can bring a 2 ton car to a stop from 60mph A physical analogy: you're cleaning the yard and ran out of large black plastic bags. You keep stuffing leaves into the bag. The incompressibility of the leaves is reach and the next handful of leaves you stuff in the plastic bag breaks it. While leaves are not an incompressible fluid, like a fluid, they can reach a point of 'no further compression is possible' just like a fluid has a limit .
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