The weird physics of upside down buoyancy
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- Опубліковано 20 сер 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.
Read the full paper here: www.nature.com...
Sign up for the Nature Briefing: An essential round-up of science news, opinion and analysis, free in your inbox every weekday: go.nature.com/... - Наука та технологія
“...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...?
"THE UP IS DOWN"
-CAPT. JACK SPARROW
*proceeds to shake the whole ship upside-down*
Over the Edge, Over again
Sunrise Sets, Flash of Green
Yes, thank you for making that reference
that’s maddeningly unhelpful
Jack was just shivering his timbers hard enough to get the boat to float on the up down
"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
"It's stable"
*Screen shakes vigorously*
lol
“Thats got to be the greatest pirate ive ever seen” “so it would seem.”
A related phenomenon is the liquefaction of saturated sandy soils during an earthquake. This is a problem with many landfills at coastal cities around the Pacific. If the landfill is made up of sandy soil, during an earthquake, the vibration will cause an increase in the interstitial pressure of the water between the soil grains, which can increase high enough that it exceeds the weight of the soil, and the soil liquefies. As a result you see buildings sinking into the ground.
Is this landfill in the sense of the soil composition or landfill in the sense of buried garbage?
@@JollyTSwift Soil composition. the area of the city is extended out into the sea using fill.
@@JollyTSwift Thank you for asking for that clarification. My grandfather was a waste disposal technician (or in other words, a garbage truck driver) before he retired, so to me, "landfill" just means garbage dump. So naturally I was very confused by the original post.
Nice video.
I love seeing my favorite UA-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...
This is the explanation of how Jack Sparrow escaped Davy Jone's Locker.
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
That's how Minecraft water elevator works
Literally yea
Yes
Yep lol
Minecraft logic is just real-world logic we don't comprehend yet
Common sense: yOu CaN't sUsPeNd liQuiD
Scientists: haha Liquid goes brrrr
No, it's
*Haha, liquid go slosh*
Flat earthers: write that down, write that down!
@@hafizibnyusri8421 what?
@@malik-h2e if we are standing on ball, then we must be upside down too right, what make us stick to earth? u can still jump easily, a baby can still jump, a grasshopper can still jump.
@@hafizibnyusri8421 It's because there is no up or down in space. We have decided that the Antarctic is the bottom, but that's just because of our need for a sense of direction
@@hafizibnyusri8421 gravitational pull maintain us on the surface of the Earth, independently of the orientation of that surface.
And you question how we can jump "easily"? It's simple: your legs makes a greater force than your weight giving you a upward acceleration. The instant you leave the ground the force made by your legs no longer exists so your weight pull you downwards, so you accelerates towards the ground until you back to it. Very simple, even a bacteria can understand.
@@hafizibnyusri8421 How fucking hard is it for you to understand gravity?
That explains that scene in pirates of the Carribbean
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 UA-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*
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.
Never knew Davy Jones was actually a physicist.
“Not Sunset, Sundown!”
It's like the Black Pearl in Pirates of the Caribbean III, when they crossed to the other word.
I practise vigorous vertical shaking since puberty. Finding the right frequency is quite important. You see, I'm something of a scientist myself.
I think I know what Christopher Nolan’s next movie will be about...
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? 👍
“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.
This glitch has been fixed in the patch v2020.9.20_universe_h67c18p.exe.
"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
THATS GOT TO BE THE GREATEST PIRATE IVE EVER SEEN
This explains how flying saucers would work and possibly how the pyramids were built- vibration/frequency waves causing levitation.
Flat Earthers: Water finds it's own lev... oh.
Flat earth mystery solved: the boat dont fall they just go upside down from the edge
lol
Nobody:
Me at 3am: *Vigorous vertical shaking*
"If the droplets can't fall, the liquid can't fall."
Hmm yes, the floor is made out of floor.
Erik Glass form
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.
That water gloating be like the falling suspended slinky
" If an atom could be suspended indefinitely, well, why not an apple? If an apple, why not a city?"
A man of culture, I see
Imagine being on a ship when this happened.
Kudos to the guy that will find a commercial application to that:)
I find it really funny a video from Nature is about a technology based phenomena that is Not observed in Nature.
Ｙｅｅｅｓｓｓ more freaky science
I swear this video is one giant innuendo
Immeadiatly subbed and a comment so youll get more attention!
Compliment to the narrator. I really like your style and voice ^^
I would like to see what happens if the container is put into freefall at the same time.
YO WE GOT FRIGGEN GRAVITY CONVERTERS NOW.
...now I want to have an upside down pond right next to my retirement manison on Mars
Now make a giant version where we can swim in it
Yes this is a bad idea
Ah yes...breaking physics without breaking physics
We need a large scale version
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
At first glance at the thumbnail my mind, of all things, decided to interpret what it saw as a monstrous mouth and teeth of some cursed creature from the deepest depths of the ocean and I SOOOO didn't like that.
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.
The way she says "air" just sounds like "eee"
So that is how captain jack sparrow calculate to turn his ship upside down
new inception film confirmed
The boat is inverted. So is time in Nolan's (the guy who did inception) new movie, Tennet. So... you're not wrong...
Imagine the sea legs you'd get
I watched this video upside down by accident until the formula at 3 mins lol
Magic is science and math. Magnificent.
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
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"
Satisfied demogorgon noises.
So its literally like a balloon trapped in a cloud, except everything here is more dense
Ah yes the magic of vigorous vertical shaking..
Ikr
giggity giggity
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.
If you ear "bowl", well, they are English attempting to say "ball"...
So that's how Davey Jones' locker works, got it.
One would assume that once the mass of the oscillating fluid drops below(due to dripping), or the weight of the object is considerably greater than the mass, required to keep the system in resonance or that the viscosity of the fluid changes due to change in temperature the system would go out of balance and so it would be best to not keep ones hopes up for levitating boat/cars cruising down the highway.
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.
Netflix: Are you still Watching?
Someone’s daughter: 0:45
😏
*Hard Sunshine theme plays*
Questions...
If I was floating on the top side of the fluid, could I swim to the bottom side?
If I stayed submerged in the center of the fluid and planked, would I float to either side?
Please seriously consider these. Thank you for your time.
Probably don't need the liquid at all- just the right vibrations/frequency- same as floating in space.
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!
🤔 Hmmm.... "As above, so below."
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
*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.
The beginning of floating car in the future
Now we know how did jack sparrow do the tricks.
"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.
Now I understand what happened in the Pirates of the Caribbean
They just proved that the Black Pearl exists.
I'm gonna show this to flat earthers when they use buoyancy to explain why things float
It's like an experiment of pencil relay between two hand fast, a new sort of pencil image formed in the middle. Nice vid.
This is basically gravitation but upside down
Now we need pulsating waves pushed into floating beams of water so we have have floating boat railways!
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
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.
Hollow planets confirmed then :-)
Conspiracy originators will be pleased !
But the fluid would polarize due to the shaking, not to mention the planet's crust imploding and the outer oceans being polarized as well. Basically due to the up and down motion the water would settle around the top and bottom. Maybe the effect shown in the video could be recreated but without a linear gravity inside of the chamber the downward force is mitigated, also the increased amount of fluid means due to the square cube law the frequency would have to be a lot more strong and steady, and there's more chances for the liquid to break formation and pull the whole thing down. Hollow Earth theory is still quite unrealistic, according to what we know now.
no.
Now that's mathamagical...
Also, surface tension plays a role....
You don’t fool me, that’s just magic
Were ready to see floating islands
You just discovered the mechanics for the base of flying vehicles gratz
lets imagine if the liquid was forced into a spherical shape, isn't that basically the same thing as gravity?
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.
This is the math behind *Pirates of caribbean* ship flipping.
At first i thought it was a squid beak but it turn out to be small boats
That's the nastiest liquid I've ever seen though
Your vids are always so creative. Love you ❤
this is the voice i want everything explained in from now on
And thus another conspiracy is born, the "Vibrating Earth".