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angry
Jun 10, 2010, 1:18 PM
Post #26 of 27
(258 views)
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Registered: Jul 22, 2003
Posts: 8405
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csproul wrote: patto wrote: DoctorSalt wrote: ah, thanks. Mine was just wild speculation w/8th grade physics. So would that imply that you weight more than the water you displace due to compression, or is it more complicated than that? Yes from a physical point of view then that must be correct if what csproul is true. (which I have no reason to doubt) Your body is mostly neutrally buoyant. Your bones, teeth, nails are a fair bit heavier than water. Muscle, hair and skin weigh slightly more than water. Fat slightly less. Most of it would roughly cancel out. Air in you lungs, mouth, throat are the main source of positive buoyancy. As pressure increases the air compression and your body's volume and thus its buoyancy increases. Water is largely incompressible so the density is barely dependent on depth. (Temperature makes makes a bigger difference.) Don't you mean buoyancy decreases? As pressure increases, air spaces are compressed, volume decreases and you displace less water....so you are less buoyant and sink faster.
That's what I thought. Compressed air is not more buoyant. Throw a CO2 cartridge in the pool or use that same cartridge to inflate some water wings. No question which floats better.
I still don't understand all the pissing and moaning over this. From start to finish, this is a beautiful vid. It's a fantastic idea that's executed very well, it's a pleasure to watch. Dunno why people are getting so worked up over the details of the dive.
And PTFTW.
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bill413
Jun 10, 2010, 1:28 PM
Post #27 of 27
(252 views)
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Registered: Oct 19, 2004
Posts: 5674
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angry wrote: That's what I thought. Compressed air is not more buoyant. Throw a CO2 cartridge in the pool or use that same cartridge to inflate some water wings. No question which floats better. I still don't understand all the pissing and moaning over this. From start to finish, this is a beautiful vid. It's a fantastic idea that's executed very well, it's a pleasure to watch. Dunno why people are getting so worked up over the details of the dive. And PTFTW.
Agreed!
(and nice work)
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