The weird physics of upside down buoyancy
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- เผยแพร่เมื่อ 27 ก.ย. 2024
- Liquid can levitate and boats can float upside down in this gravity-defying physics experiment. Researchers in Paris have been investigating the effect of vertical shaking, which can be used to suspend a layer of liquid in mid-air. They have discovered a peculiar phenomenon that allows lightweight objects to float on the bottom surface of this liquid, with a kind of reverse-buoyancy. This counter-intuitive behaviour is a result of the constant vibrations which changes the forces acting on the floating objects.
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“...The answer is vigorous vertical shaking...”
As is the answer to any question...
What do I do with this crying baby?
@@adriant1988 you know what to do
@@adriant1988 Just don't shake horizontally. Big beginner mistake.
I guess im the only one who interpreted this in another direction then 🤣
@@tthesea5907 Lenny face...?
"It's stable"
*Screen shakes vigorously*
lol
“Thats got to be the greatest pirate ive ever seen” “so it would seem.”
"Not with magic, but with maths" is going to be my catchphrase.
That's a cool quote that can be used in writing
Be careful how you interpret this - I'm pretty sure it wasn't the math, but casual tinkering, that led to the discovery of this idiosyncrasy. Math merely "checks out" the phenomenon after the fact. Historically very few scientific effects (lasers, for example, being the exception) have been discovered by the route of math or theories.
That'll be a good gravestone quote.
Why "maths" and not "math"?
@@zeryphex maths is just the British spelling of math, both are right
Nice video.
I love seeing my favorite TH-camrs on other videos ♥️
Indeed
TRUE!
You are the best
Hey i love your videos
Noice.
This is an example of how COMMON SENSE CAN BE UNSCIENTIFIC.
truism. All common sense is unscientific.
I think I get your point. Perhaps it could be phrased this way: much of what is true (scientifically verified) is counter-intuitive i.e. is not "common sense"
Einstein: "Common sense is nothing but the set of prejudices formed by the age of 18" (or something like that), meaning that common sense does not provide a solid foundation on which to form empirically true conclusions.
@@userou-ig1ze Not sure about that: "common sense" tells me that if I jump from the 10th storey, then I will hit the ground hard, and probably die - all true.
@@BlueSoulTiger no one claims what you believe, by means of common sense, isn't true. The claim is that all reasoning derived by what is understood as 'common sense' is unscientific
@@BlueSoulTiger A better example would be is if you try to open a cold jar with a metal cap. Common sense dictates we brute strength twist the cap until it opens, a more scientific approach would be dunking the metal cap in hot water to expand the metal and make it easier to open...
That's how Minecraft water elevator works
Literally yea
Yes
Yep lol
Minecraft logic is just real-world logic we don't comprehend yet
This is magical
Not with magical but with mathcal :)
lol, no its not
Everywhere i go i see this guys face....
bot
No my friend.... ITS SCIENCE
Common sense: yOu CaN't sUsPeNd liQuiD
Scientists: haha Liquid goes brrrr
No, it's
*Haha, liquid go slosh*
So... how long till flat earther’s use this as an excuse.
Dont give them another idea.... I hate hearing their stupid reason and logic
@@bluedaylight1243 true
Ima laugh if they do XD using science to prove something science disagrees with. I cant wait
Flat Earther "Research flat earth sheep!!1!!1!"
They wouldn't under stand this because with out gravity the boat wouldn't be able to float upside down.
So this explains the flipping of ship in pirates of carrebian 😲😂
Came here to say exactly this 😂
But the sky isn't being compressed in that example
@@Kaiwala Do you really know?
@@medsuit1686 hmm, no I don't.
Watch Reprogram The Matrix on TH-cam. 😁
It’s like that scene from the movie tomorrow land. The floating swimming pools.
Nice idea, terrible execution. That movie tmrland
*Not sunset sun down and rise up.*
Whats that?
What is that?
I dont know what do you think?
Where? There!
*Some moments later:*
He's rocking the ship?
*We're rocking the ship!*
Jack: (probably in doubt that this works) *Now up is down*
Never knew Davy Jones was actually a physicist.
“Not Sunset, Sundown!”
“Upside down buoyancy”, also known as “sinking”
Not really, even sinking objects have an "upright" buoyancy. The fact that they are sinking just means that the gravitational force downwards is greater than the buoyant force upwards.
Moosetacoful ...Sad but True...
And this buoyancy is in fact the same direction as normal buoyancy. the only thing that switched orientation is the boat and the surface.
lol
@@Moosetacoful
Now I'm imagining a ship sinking upwards. Sinking upside down into the suspended liquid.
I practise vigorous vertical shaking since puberty. Finding the right frequency is quite important. You see, I'm something of a scientist myself.
Is there also some surface tension holding the object?
No
@@billied2003 Explain
@@NS-gr9cy the molecules are cohesive with respect to one another that's why its globular. The liquid wants to stick to itself rather than the air medium but the force of gravity pushes it down
No that's wrong
It might probably help boyancy in keeping the boat floating , but I do not think it's effect will be so pronounced to hold the boat all by itself . We could probably sort this issue out if the scientists scale up the system or use some other liquid with lesser surface tention . We can't rule out surface tention's action before we vary the surface tention right? 👍
"the math checks out" .... lol. I like how we jumped from observation to proof with that magical step 2 there
Yeah, as if they had to prove this isn’t magic because math says so. Otherwise it might be.
@@Dogpool not exactly. They don't be able to explain something doesn't mean it's magic.
Malik T what would they say if the math didn’t check out? Maybe not magic. How bout tapping into another dimension
@@Dogpool It's just show that our currently knowledge of reality is not able to predict that phenomena. In another words: they don't what is going on. Maybe magic, but not necessarily.
Since, we can predict it with our previous knowledge it's just a weird implication of what we already know.
Malik T, thanks Malik. The math checks out
I would assume that adhesion between the upsidedown boat and the liquid also plays an important role, but adhesion isn't mentioned in this video. After reading the article, I found that surface tension and capillary forces only play a small role. Yet I'm not sure if this directly correlates to adhesion forces.
Flat earth mystery solved: the boat dont fall they just go upside down from the edge
lol
Immeadiatly subbed and a comment so youll get more attention!
Compliment to the narrator. I really like your style and voice ^^
This explains how flying saucers would work and possibly how the pyramids were built- vibration/frequency waves causing levitation.
The floating liquid part is really cool. The "upside down buoyancy" not so much -- it's not floating in the liquid upside down, the air pressure it trying to push it up but it's blocked by the liquid
That's what the lady said tho
I mean, it kinda works the same way.
Normally gravity pulls it down, but the liquid stops it.
In this case air pressure pushes it up, but liquid stops it.
I think "upside down buoyancy" fits it.
I would like to see what happens if the container is put into freefall at the same time.
Nobody:
Me at 3am: *Vigorous vertical shaking*
This glitch has been fixed in the patch v2020.9.20_universe_h67c18p.exe.
That water gloating be like the falling suspended slinky
Flat Earthers: Water finds it's own lev... oh.
Amazing video. Do you think this would still work with sound waves instead of mechanical shaking?
I think the usual point of view would be that vibrations in a physical medium are in fact sound waves.
1:49 it looks like that it is on top of a speaker
Just saw this yesterday and haven't read much of the comments, but wouldn't this just be that due to the vibrations, there are minuscule or even microscopic vacuum pockets being formed between the liquid and the object, thus keeping 'stuck' to the liquid?
What's a vacuum 😏 like space ? And gravity holds our atmosphere right? A solid surrounded by a vacuum? Like a bubble under water right ? No that would be the opposite... bubbles are a vaccume surrounded by a solid... I just learned why gravity is a theory
We need a large scale version
Kudos to the guy that will find a commercial application to that:)
Could you create this as a sphere?
With "ships" around it, same simulation.
YO WE GOT FRIGGEN GRAVITY CONVERTERS NOW.
Now make a giant version where we can swim in it
Yes this is a bad idea
I mean if the air pressure is strong enough to keep the liquid above it's not hard to see that it could keep the boat in place.
So its literally like a balloon trapped in a cloud, except everything here is more dense
Imagine the sea legs you'd get
Ｙｅｅｅｓｓｓ more freaky science
If you ear "bowl", well, they are English attempting to say "ball"...
I noticed this would be possible with soda bottles when I shaked them as a kid. They are just discovering it? I must be a genious!
It's like an experiment of pencil relay between two hand fast, a new sort of pencil image formed in the middle. Nice vid.
Not with magic, not with maths, not even with mathemagics. Just physics, fluid dynamics, and air-pressure. Never seen a boat drip so much up and out of its mast like that before. Clearly, it's the shaking in a rigid container, not the spinning and hurtling through a vacuum, that makes this neat little trick possible. Oh, and magnets.
Ah yes the magic of vigorous vertical shaking..
Ikr
giggity giggity
...now I want to have an upside down pond right next to my retirement manison on Mars
So Australia is shaking vigorously like 24/7
attach that to a top of car and give it enough energy so it vibrates enough to hold the car, the more it holds the more higher the car goes
interesting thing to think about gas giants transportation, a density layer for each type of vehicle
At first i thought it was a squid beak but it turn out to be small boats
Its something v call gravitational levitation coz when an atom is heavier than liquid so this object will turn out to in order to make sure it is equally levitated
So, if the frequency is too low, the effect goes away, but what if the frequency is too high? Would the same occur? I'm guessing yes?
Probably no, this effect relies on resonance I think, which happens at a specific frequency, not over ite
I wonder if they could place a tiny toy on the upside down boat to see if it is something like “artificial gravity similar” phenomenon.
Would be nice if we could, you know, actually read the paper instead of it being behind a paywall, since the trapped air underneath doesn't explain this effect at all really since the object floats the "correct" way as well and doesn't float in the dense air.
🤔 Hmmm.... "As above, so below."
Satisfied demogorgon noises.
fun fact, the liquid used here is also obtained through a similar process of vigorous vertical shaking
So that's how Davey Jones' locker works, got it.
"It goes right bk to its previous position. Just like it's counterpart on the top"
Yet the very beginning of the video shows that's not the case. The boat on the bottom completely fipped to straight up and down, to upside down.
Also, surface tension plays a role....
Ah yes...breaking physics without breaking physics
*Hard Sunshine theme plays*
that's a long way to go to make your steampunk fan fiction with the up side down ocean "plausible".
Magic is science and math. Magnificent.
This is the math behind *Pirates of caribbean* ship flipping.
Would it be theoretically possible to build a swimming pool that is suspended in mid air? Or would the enegery cost be too immense? Would people be able to swim inside it?
Not just IN it, but under it.
Now we know how did jack sparrow do the tricks.
*Most* things in nature are the same if you flip it or add a negative. Anti matter behaves just like matter, negative speed is just speed backwards, etc.
not going to lie, I imagined the last few lines of the video being spoken by Rick "It's not magic *braappp* Morty, it's science, and don't you fucking forget it"
this is the voice i want everything explained in from now on
Think about having one of the shakers but a really big one. Maybe we could use it for gravity stabilizers in space
Were ready to see floating islands
lets imagine if the liquid was forced into a spherical shape, isn't that basically the same thing as gravity?
So this is how we can explore the deepest part of the sea
I wonder if this could be applied in a controlled way to anything?
Yes, probably!
That's the nastiest liquid I've ever seen though
This was a very nice video. Please post a video on theory of relativity. Please answer me
Now we need pulsating waves pushed into floating beams of water so we have have floating boat railways!
The flat earthers are going to be very mad with this finding...
wheres the green flash
Does it still work even when it’s not in an enclosed vacuum like system where the air is free?
That's my favorite POTC movie
that is how the fifth layers ocean stays up
I mean, if the video ended with a: "Nah, just kidding, all the footage is 3d hiperrealistic animation" I wouldn't even be surprised
The video must be fake, gravity would have seperated the boat and the boat would fall into the air pocket.
What are the practical applications of this discovery?
that someone will graduate or get the PhD
One of the practical applications is that if the research continues and we get some fruitful results, then in the future there could be a printing company who could be able to physically print several phd thesis copies on this research topic.
It can be used as a separation technique
Old. The Australian navy has known about this for years now.
@@NS-gr9cy an unwarranted smartass reply from someone who clearly doens't know better
0:39
I suddenly remember Englewood, Anyone?
Some has to swim upside down
I feel like the title of this video is misleading somehow, but I don't have a tight enough grasp on the specifics of how buoyancy works on a technical level to explain why. Not to say there is any attempt to mislead, but in an attempt to find a simple way to describe what is happening, the description trades technical accuracy for simplicity.
Like when you learn about something in elementary school, but when they teach you about it again in high school, they're like "Yes, we taught it to you like this, but that isn't entirely true, it was just close enough for you to get the giat of it".
It helps if you think of bouyancy as a general term for displacement force in liquid due to a prevailing constant force.
For example, if you have something floating in water on a space station that simulates gravity through rotation, the force keeping that thing floating is still bouyancy, even though there is no actual gravity involved.
The beginning of floating car in the future
I'm gonna show this to flat earthers when they use buoyancy to explain why things float
"Up is down"
This is incredible! If testing. This theory on a much larger scale, we may be able to achieve anti gravity chambers or bottomless pools.
Unfortunately not, as the liquid needs to be exponentially more viscous as you increase the area.
*Make a gigantic size of this and let someone swim through the levitated liquid.*
Nice! Thank you.
Now just do it with air and we might have levitation...
You don’t fool me, that’s just magic
Adhesion is an effect of viscosity.
I need the shakers, for reasons..
Looks more like the liquid is using the boat as a conduit to alleviate the pressure it's under.
So usually the deepest liquid body has the most pressure. How about levitating liquid body? Where the highest pressure occurs? Middle?
In a vacuum and without external gravity, yes.
All objects that has mass has a specific gravity. For a planet made entirely out of water, it would have a very compressed water core. The closer an object is to the center, the greater its force due to having more mass crushing from above therefore increases pressure.
For a water droplet falling in earth even without air resistance, would stretch the droplet a tiny bit elongated, and the center of mass would shift slightly closer towards the direction at which the core is due to distance differentials.