Subject:
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the compressibility of water (was Re: Darn those definitions (was: The new Super Car)
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Newsgroups:
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lugnet.off-topic.geek
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Date:
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Tue, 10 Aug 1999 19:46:10 GMT
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Viewed:
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173 times
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In lugnet.robotics, Dennis Clark writes:
> This is all quite true of water, its not compressable. Is water unique in
> that aspect?
Water is compressible, just not enough for people to notice.
Just in case anyone cares, I looked it up.
Compressibility of water at 20 degrees Celsius:
49.1 PPM per atm (from 1 atm to 25 atm)
47.6 PPM per atm (from 25 atm to 50 atm)
46.8 PPM per atm (from 100 atm to 200 atm)
Values are averages over their respective ranges. PPM = parts per million; atm
= atmosphere.
For example, at 1 atm (ground level air pressure), a metric ton of pure water
takes up 1 million CCs (cubic centimeters) of space. If compressed to 10 atm
(ground pressure plus nine atmospheres), say by being about 95 meters below the
surface of a lake, that same mass of water would have a volume of about (9 x
49.1) cubic centimeters less than a million, or about 999,558 CCs.
- Robert Munafo
LEGO: TC+++(8480) SW++ #+ S-- LS++ Hsp M+ A@ LM++ YB64m IC13
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