Submitted 3 days ago by Crackhappy@lemmy.world to [deleted]
Water doesn’t compress (for all intents and purposes), so no. I.E. the water pressure of the ocean would indeed push inward against the balloon much more strongly, but the water inside the balloon would push back by the same amount.
Nothing special would happen if you pop the balloon, the rubber would just rapidly contract, basically the same as it would above the surface.
Liquid Water does not change it’s density much with pressure, but yes.
Water is incompressible.
Not it’s not, common myth/misunderstanding.
From Wikipedia (couldn’t find a way to link directly to that part of the page):
Image
Ok, so for all intents and purposes, water is incompressible.
Virtually incompressable
Depends on how much air is in there with the water.
Water itself is incompressible so the balloon won’t shrink that much, but there’s some air in there so it would shrink a bit.
The balloon’s popping action comes from being filled and expanded. It’s an elastic, so if something breaks it, it snaps back.
The only way that wouldn’t happen is if there was mostly air in there, and you went to the appropriate depth where that air was compressed down to its original volume.
At 100 m the compression would essentially be nil.
If you take it deep enough for there to be measurable compression and then pop it, nothing will happen because it’s already compressed.
nooneescapesthelaw@mander.xyz 3 days ago
Let’s first state our assumptions:
Very thin membrane, the balloon skin cannot be compressed more than it already is
Zero trapped air
Isothermal conditions, water temperature at the bottom of the ocean is the same as the top, that way we don’t need to deal with thermal expansion
Balloon is a perfect sphere
Calculations:
Pressure on the balloon is densitygravitydepth ~= 100010100 = 1 Mpa or 10 atmospheres
The bulk modulus of water is 2.2 Gpa so (change in volume)/(initial volume) = (change in pressure)/(bulk modulus) = 0.0046% decrease in volume
0.0046% decrease in volume is like a 0.015% decrease in radius
magnetichuman@fedia.io 3 days ago
is there a /m/theydidthemath ?
_NetNomad@fedia.io 2 days ago
/m/theydidthemonstermath