QUOTE(Stellar @ Feb 21 2005, 12:19 AM)
QUOTE(et's daddy @ Feb 21 2005, 04:09 AM)
and you know that because ?
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Because I remember hearing it somewhere and because I know that the pressure is so immense that a pocket of air couldnt hold.
You're not problem solving, you're rationalising.
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Actually it could hold. Provided that the cave was perfectly formed into either aperfect arch or a perfect sphere. Both of which are quite "rare" to say the least in nature. That would be the only way that a cave at the bottom of the ocean could hold out with millions / billions of gallons of water sitting on top of it.
However...
If the caves were air tight, then there would be no way for it to collapse unless the now pressurized air was somehow released. Think of a can of baked beans that is open. If you stand on the side of it, with all your weight, what happens? It collapses right? Now take that same can, unopened, and stand on it in the same manor. It will stand up to your weight now. This is because of the pressurized air. This I'm sure you already know.
But, the best part is yet to come. Now you might say that the can would collapse after enough weight is put on top of it, right? This only happens because the pressurized air inside, along with the contents, have somewhere to go.
Now encase the can of beans in solid cement. Apply the same pressure you did to get the can to collapse while it was full. It will take nearly 1,000 times the pressure now to collapse the can, and even before then, the concrete would have to collapse first. This would apply to an under ocean cave as well, provided it was totally encased and air tight.
This is the best explaination I can give right now (I'm at work). I think this might be what they are arguing about Stellar. Check with them though.