The weird physics of upside down buoyancy

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.

[waterunderthebridge]

“...The answer is vigorous vertical shaking...”

As is the answer to any question...

[---------______]

"THE UP IS DOWN"
-CAPT. JACK SPARROW

[doxielain]

"Not with magic, but with maths" is going to be my catchphrase.

[Alex_Plante]

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.

[roastedtoast]

“Thats got to be the greatest pirate ive ever seen” “so it would seem.”

[jandaleligna]

This is the explanation of how Jack Sparrow escaped Davy Jone's Locker.

[berkleyhuffman]

"It's stable"
*Screen shakes vigorously*

[haniefsofi]

This is an example of how COMMON SENSE CAN BE UNSCIENTIFIC.

[baginatora]

Common sense: yOu CaN't sUsPeNd liQuiD
Scientists: haha Liquid goes brrrr

[pamone]

That's how Minecraft water elevator works

[captainjack]

That explains that scene in pirates of the Carribbean

[fraggzbN]

I practise vigorous vertical shaking since puberty. Finding the right frequency is quite important. You see, I'm something of a scientist myself.

[ChibiKeruchan]

Captain Jack sparrow : well, amazing isn't it? That's how we got out from Davy Jones locker.

[GrimOfDonuts]

So... how long till flat earther’s use this as an excuse.

[somedude]

Flat earthers: write that down, write that down!

[saims.]

It’s like that scene from the movie tomorrow land. The floating swimming pools.

[pradeepgade]

So this explains the flipping of ship in pirates of carrebian 😲😂

[albert_the_cool]

*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*

[NS-grcy]

Is there also some surface tension holding the object?

[swisscheese]

Never knew Davy Jones was actually a physicist.