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[BBC News] James Cameron dives to deepest ocean point - Page 6

post #51 of 61
DId JC go down on the maiden voyage? Maybe they should have sent down someone like Justin Beiber first to make sure it wasn't going to implode at that depth....rolleyes.gif
    
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post #52 of 61
I have a fear of river/oceans where I can't see the bottom.
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post #53 of 61
To implode you must have less pressure on the inside.
Any object that sinks and has pockets of air trapped in them eventually those sections will implode if given enough depth.
Wood absorbs water so it will equalize with the pressure, and it is a solid material, like metal.
Any weaknesses in a solid objects will show dents where the pressure equalized the material.
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post #54 of 61
Quote:
Originally Posted by redsunx View Post

Why don't sunken ships and stuff implode from the pressure?

because once they sink and fill with water, its like, why your lungs dont collapse from the millions of pounds of pressure on you now from the atmosphere. the fluid inside the ship is now the same density as the fluid outside, meaning if you were inside that sunken ship, you would also be put under 11,000 Pounds of pressure assuming that the ship was full of water at that depth.
    
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post #55 of 61
did this take place yet? I would love to see the footage he records while down there.
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post #56 of 61
Quote:
Originally Posted by redsunx View Post

Why don't sunken ships and stuff implode from the pressure?

Seriously?? Questions such as this make me want every nickel of my tax money spent on education refunded to me, with interest.

Here is the answer: "Sunken ships and stuff" don't implode due to the fact that sunken ships are full of water at the same pressure as that on the outside. It is the pressure differential between the high pressure water and low pressure inside of a submarine that causes an implosion when the pressure exceeds what the hull can withstand. While something is sinking, implosions can and do occur when air pockets within ships are crushed when the pressure gets great enough- providing the cavity does not fill with water slowly first. Also, things like an aerosol can would implode at a certain depth if it were trapped on a sinking ship for this same reason.
    
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post #57 of 61
Is that an Ood?
Planet_of_the_Ood.jpg
Edited by Unstableiser - 3/26/12 at 1:07pm
post #58 of 61
Quote:
Originally Posted by Weasel555 View Post

http://www.history.com/videos/submerisble-trieste-makes-worlds-deepest-sea-dive#submerisble-trieste-makes-worlds-deepest-sea-dive
really? What about the trieste? It did the dive in the early 60s.
Here's some more history on it:
http://www.history.navy.mil/photos/sh-usn/usnsh-t/trste-b.htm

Ignore Zeallot. He's a master troller with his misinformation.
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post #59 of 61
As an engineering challenge just getting to the bottom is difficult. It is easy to design a vessel to hold internal pressure, we do that all the time. The pressure can often help as it maintains the shape of the vessel and can assist in supporting it's weight. As the stress is transfered to the material the limiting factor tends to be the material properties, rather than the geometry.

Designing a vessel to cope with external pressure is a whole different matter. The pressure is trying to collapse the shape, so everything has to be a lot stronger. I have designed vessels to cope with full vacuum, which would be the equivilent of 1ATM (14.7 psi) external pressure, and that can be a challenge. These submarines, although admittedly a lot smaller than the vessels I design, have to cope with thousands of times that.

In case you imagination can't supply you with details, here is a video showing what happens if you get it wrong with 1 ATM (14.7 psi) only:

That was a test done by a German manufacturer on their train cars. And yes, it is in real time, not sped up at all. I don't know if they filled it with water then drained it without opening the top vents, or filled it with steam (as you would during steam cleaning) and sealed it. Both of these scenarios can happen in real world usage.
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post #60 of 61
I lvoe the Ocean! So many Great things to eat in there!!!

Anyone ever see an Axelotl and though, Man i wonder what that tastes like on a bun,.,,

217

But yes, sooooooooo much Area unexplored, it really is truly amazing how little we kno a bout our own planet, and what do we care about? Whats NOT on our planet lol.

I say, I cant wait to find life on another world , so i can eat it.
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