Ever wonder what 10 cubic centimeters of water equates to?

General Discussion on any topic relating to CPAP and/or Sleep Apnea.
garyland
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Ever wonder what 10 cubic centimeters of water equates to?

Post by garyland » Mon Nov 21, 2005 3:51 pm

It equates to 0.1422 pounds per square inch.

Gary

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Titrator
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Post by Titrator » Tue Nov 22, 2005 8:04 pm

Very interesting, thanks for sharing.
Image

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Ric
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Just to keep this interesting...

Post by Ric » Wed Nov 23, 2005 10:52 pm

did YOU know,
that equates to about...

2.4908891 pieze
1.8683202 centihg
0.2490889 decibar
0.0024909 dekabar
0.0002491 hectobar
186.8320435 decitorr
24,908.8908333 barye
0.8333333 foot of head
1,868.3204351 centitorr
18,683.2043515 millitorr
0.0520233 kip/square foot
5.7803667 ounce/square inch
249,088.9083333 centipascal
644.6252176 foot of air [0 °C]
0.0254 atmosphere [technical]
2.4908891 sthene/square meter
24,908,890,833,333,328 attobar
0.0232247 ton/square foot [long]
8,161.7358807 inch of air [15 °C]
0.0245832 atmosphere [standard]
2,490,889,083,333.333 nanopascal
253.9999983 kilopond/square meter
25.3999998 centimeter of water [4 °C]
24,908.8908333 dyne/square centimeter
24,908,890,833,333,328,920,472,008,024e+28 yoctopascal

and the one you've all been waiting for.......

24,908,890,833,333,328,920 zeptobar !!!

(oh dear! somebody had too much time on their hands)

Inches of water is good, it means you only hafta punch in one or two digits on the machine, generally. Probably why they chose that. Just a guess.
He who dies with the most masks wins.

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Kemosabe
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Post by Kemosabe » Thu Nov 24, 2005 1:50 am

644.6252176 foot of air [0 °C]
So if I could dig a well about a mile deep and have my nose at the bottom and my head at the top, I'd get the equilivent of 8 cmH2O cpap.

That's yet one more excuse to buy that surplus oil drilling rig I saw on eBay. (my DW thinks I'd just end up parking it in the back, next to the cherry-picker and the halftrack)

Once science overcomes the minor nose stretching issue, I'll have a nice business providing "Natural OSA therapy".



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derek
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Post by derek » Thu Nov 24, 2005 5:20 am

Gary,
Not to be picky, BUT the title of your post is quite erroneous. The pressure has nothing to do with a a volume (cubic cm.), but rather the height of a column of water (cm., or in.).

In other words, I could take 10 cubic cm. of water as a cube 5cm. x 2 cm. on the base and 1 cm. deep, or I could take the same volume as a tall column 0.5 cm. x 0.5 cm. by 40 cm. deep, The pressure at the base would be vastly different in each case. The pressure depends on the depth (height of the column).

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MissAmethyst2U
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Post by MissAmethyst2U » Thu Nov 24, 2005 8:17 am

LOL I feel like I am back in 7th grade math class...Lordy, this was like the second post I clicked on and just having woke up my poor brain cant handle all that this early! Some of the people on this site are way too intelligent lol

sir_cumference
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Post by sir_cumference » Thu Nov 24, 2005 10:13 am

You know what? All this information and I still have no idea what anyone's talking about? Why not give it to me in a measurement I can understand ... like ... for example ... it equate to ... say ... balancing half a big mac on my right ear-lobe ... science hah! - gibberish in fancy dress!
sir_cumference (confused as always)

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Ric
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good news, bad news....

Post by Ric » Thu Nov 24, 2005 11:06 am

Kemosabe,

Here's some good news: you can stop drilling WAAAAAAAAAY short of a mile. in fact, stop as soon as the air pressure differential reaches about 24 quintrillion zeptobar. (about 680 feet) That's assuming Boulder Creek is at sea level (which it's probably not), and 15 degrees centigrade (well maybe), and the gravitational acceleration is constant (which it's not, but close enough). more good news: you can rely on the gravitational constant to remain the same and isotropic at all depths (ignoring relativistic effects and the age of the universe, which is open to debate, (but not here)). Maybe drill a few extra feet, just to be safe.

Now some bad news: the pressure gradient which you have achieved by drilling so deep will not lead to any airflow, since the tug of gravity acting on the column of air will (which created this pressure in the first place) will exactly cancel out any force of pressure you were hoping would blow cool clean air up your (now barely recognizable) nose.

More bad news: probably don't rely on this new "natural OSA therapy" as a big revenue generator. I don't visualize flocks of OSA victims lining up to pay big bucks to get treated at the well. (At least don't make this your retirement plan). Also, before you spring for the drilling rig, maybe field test this idea somewhere on an existing dry well. Plenty out there.

Now for some good news: let me know when you decide to try this, I would pay (up to a certain amount) to WATCH!

( I like your creativity ! )

He who dies with the most masks wins.

garyland
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Post by garyland » Thu Nov 24, 2005 12:10 pm

Wow,

I can't believe what I started here. The neat website that gave me that info was http://www.convert-me.com

Don't go to http://www.convertme.com as it is some Christian site that will try to convert you! Praise Jesus!!!

Gary

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Kemosabe
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Post by Kemosabe » Thu Nov 24, 2005 8:16 pm

Good points Ric. Perhaps I didn't think it through enough.

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Ric
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about the RIG

Post by Ric » Thu Nov 24, 2005 9:00 pm

...but I think you should get the drilling rig anyway.

no home should be without one.






(so that was YOU, outbid me on eBay, drilling rig, wouzy wabbit! )
He who dies with the most masks wins.

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Kemosabe
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Post by Kemosabe » Fri Nov 25, 2005 12:50 am

Had a talk with my DW about it, she says if I get the drilling rig I've got to get rid of the halftrack (and that's not happening).

Sorry you didn't win the rig. Better luck next time.


Guest

Post by Guest » Fri Nov 25, 2005 3:08 am

Correct me if I'm wrong, but if you were to drill or dig a well and then go down it to get the added advantage of the extra pressure, wouldn't that fail because the whole idea of therapy is to have a differential pressure between what's on the outside of you and what's being pumped inside?

So unless you really could take you nose down 680ft and keep your chest at the top of the hole, it would fail. Or have I misunderstood?

confused guest

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Ric
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Re: good news, bad news....

Post by Ric » Fri Nov 25, 2005 8:16 am

Thanks Guest, good question. let me quote a (famous) author who has addressed that very issue far more eloquently than I could possibly say it myself:
Ric wrote: Now some bad news: the pressure gradient which you have achieved by drilling so deep will not lead to any airflow, since the tug of gravity acting on the column of air will (which created this pressure in the first place) will exactly cancel out any force of pressure you were hoping would blow cool clean air up your (now barely recognizable) nose.
That's kind of confusing. Imagine this little experiment, drop a hose into the ocean to any imaginable depth where the pressure is very large. This does not lead to water rushing up the hose and causing a sustained geyser, (and free energy, etc.). It's just a hose dangling in the water. Same physics.

I think what he was trying to say there is that whether it's your nose or a hose that fell into the well, you're pretty much stuck with the pressure at the TOP of the hose (or your nose), which, as you predicted, would not cause air to flow where you want it to go.

Your intuition is correct.

I hope that clarifies the clarification.

He who dies with the most masks wins.

ProfessorSleep
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Post by ProfessorSleep » Fri Nov 25, 2005 12:56 pm

Ohmigosh - and I'm still trying to fiture out this sine wave converter stuff for good ol' fashion electricity! Great thread, guys - you gave us all a good (and needed) laugh (and physics lesson)!