In scuba, why does the diver’s air get more compressed with depth? Does the tank not protect the air from outside forces?
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The air in the tank doesn’t get more compressed, it’s unaffected unless maybe your corpse falls down the Marian’s trench.
The regulator drops the air pressure from that in the tank to match ambient for you to breathe. If you’re above water, it lets out normal atmosphere pressure air. If you’re 10m under water where water pressure is two atmospheres, it lets out air at two atmospheres to breathe.
Why does it do this? So you’re lungs and chest don’t collapse. If you were still breathing in surface one atmosphere pressure air but had two atmosphere pressure water on the outside of your chest, it would be like trying to breathe with someone sitting on your chest.
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