Can you sink by blowing up your BC below 40m?

[Russoft]

No. The critical point (C) of nitrogen is at 126K, that is below room temperature. So you cannot liquefy nitrogen just by compressing it, no matter how hard you try. It will just get denser and denser, but never outright undergo a phase transition and condensate unless you chill it.

 

[Schwob]

No. The critical point (C) of nitrogen is at 126K, that is below room temperature. So you cannot liquefy nitrogen just by compressing it, no matter how hard you try. It will just get denser and denser, but never outright undergo a phase transition and condensate unless you chill it.

Not even in the presence of negative bubbles?

 

[kafkaland]

Not even in the presence of negative bubbles?

I wish... I'd start an industrial gases company in a heartbeat and put Linde and Air Liquide out of business. Instead of big refrigeration plants I just need a puny compressor to get to 5 ATA and some negative bubbles... And the compressor and delivery vehicles will be powered by perpetuum mobiles. And Maxwell's Demon will be my vice president for marketing.

 

[dberry]

I think we've entered the silly season.

 

[Storker]

The air in your lungs is at 5bar as well at that depth.

Whoooosh (I think...)

 

[dberry]

Whoooosh (I think...)

Is there an emoticon for "Whoosh"? If not, there should be... It's not the same as face-palm

 

[RainPilot]

My suggestions

 

[dberry]

@RainPilot offered his suggestions for "whoosh" emoji:

general frustration, doesn't require someone missing the joke

slightly mean (L = Loser)

too big

Not bad, but maybe too subtle

I'd like to see a real hand-whooshing-over-the-head, although I'm as likely to be the recipient of a whoosh as the poster of one.

 

[Patoux01]

Whoooosh (I think...)

Finnish humor is not something I'm expert in.

 

[Boyan]

That's the spirit!
I think
@Kevrumbo
put forth a good stab at where the real misunderstanding might have been rooted in. But who knows.
If you ever find out from your friend, please do let us know.
Or maybe not, maybe someone can leverage this into a grant to research some of the alternative truthts... um, thoughts...

He was clear about the action of inflating your BC at great depth causing you to go down slightly, which would then "put you over the edge" and make it very hard to go up again, but thinking of it I have never experienced anything like that at 35m for example. He said this effect is the reason for all the mysterious cases, where a diver goes down instead of up and someone needs to chase them.

I thought maybe inflating the BC also causes a small propulsion in the downward direction, which could in theory give you a little force downwards, but then again the BC hose points downwards, not upwards.