How exactly does underwater pressure work?

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It doesn’t actually cause humans to get crushed “like empty cans of of soda” right?

In: 3

It absolutely can.

As you descend into water the water above you still has weight. The further down you go the more weight the water has the more pressure pushing on you. You would have to descend at a really high speed to crush like a can but if you are in a depressurized water craft and hop out of it at the bottom of an ocean, you have a high chance of death to water pressure.

Yes. Quite literally, and for the same reason. Deep underwater, the pressure of the water is way higher than the pressure of the fluids inside our bodies. Therefore, we will be compressed until those forces equalize, exactly like an empty tin can would.

I would not recommend looking up pictures of delta-p injuries.

Yes, yes it can cause pressure damage like empty soda cans.

So air is less dense that water and in order to function, you as a person have air in your lungs and oxygen dissolved in your blood stream. So you are less dense than water which is why you can float on water.

If you descend too deep or too fast the pressure can make your lungs cave in or the dissolved oxygen in your blood could form bubbles which can kill you.
It’s why divers have to descend and ascend slowly so their bodies can acclimatise slowly.

If you somehow teleported directly there from the surface you would die… fast. The air in your lungs would be crushed to about 1,000th of its volume and water will immediately enter your lungs… your digestive system as well. Even your bones would be crushed. But all this would likely be so violent I wouldn’t care to think of the exact impact on the body. Suffice to say I would expect explosive responses.

If you had some special oxygenated fluid in your lungs and digestive system and travelled down there at a very gradual rate, you’d likely survive the pressures alone.