I was thinking about deep sea, specifically. If take an air-filled balloon deeper and deeper it will get smaller and smaller. If I take a water filled balloon, it doesn’t change much (I guess temperature may have a small effect on density?).
If I take a thin aluminium air filled sphere it will crush at a certain depth. If it’s water filled it stays intact.
Here’s my question: if I enclose myself in a metal sphere that’s filled with water (so that it doesn’t crush), will I be subjected to the pressure of the water above me? If yes, how is the water pressure transmitted through the rigid sphere? If it was an air filled sphere, it would crush me, but does the water in the sphere somehow protect me?
I think I just haven’t got my head around a few key principles…
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In your question, I assume that the sphere you are using is, indeed crushable, since you say it is filled with water and you’re inside it.
That being the case the answer is easy. As the pressure outside the sphere presses in, it is transferred to the water inside it and crushes you!
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