[thechat] sport and life?

[Joe Crawford]

Martin Burns wrote:

>>>> Of course it might well have been a wind up. In which case feel free to
>>>> shoot me down in flames :-)
>>>
>>>
>>> Sorry, OIly - total windup. Both impractical and fucking dangerous
>>> in a safety obsessed sport.
>>
>>
>> Just a hunch, but wouldn't this essentially turn the diver into a 
>> depth charge? How deep would you need to go before (theoretically / 
>> actually) exploding?
> 
> 
> Implode on the way down, explode on the way up. You
> get one extra atmosphere of pressure every ten metres.
> 
> To think about what happens if you release that too quickly,
> get a coke bottle with the lid on, shake it, then unscrew the
> lid quickly.


Hm. On a theoretical level you could put random extra gases/particles 
into the mix - but know that putting "extras" (like a aerosolized 
nicotine) while under pressure is probably a bad idea. Now, that said, 
when I was an RT we would have patients undergoing mechanical 
venitilation (machine breathing for them, commonly mislabeled 
"respirators") - with extra positive pressure added - when we aerosolize 
medicines in that circuit that would be a similar effect. I'd say that 
aerosolizing nicotine is a bad idea all 'round. Not the same as 
hyperbaric, but /roughly/ analagous.

Another way to think of it is this -- if you've ever opened your eyes 
underwater and blew a bubble - it will get larger in volume as it rises. 
A neat effect.

Check this:
http://www.howstuffworks.com/question101.htm
	-- but i wish it had diagrams.

	- joe <http://artlung.com/>