Subject:
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Re: Darn those definitions (was: The new Super Car)
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Newsgroups:
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lugnet.robotics
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Date:
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Sat, 7 Aug 1999 19:53:05 GMT
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Viewed:
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1146 times
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In lugnet.robotics, lego-robotics@crynwr.com (Jim Choate) writes:
>
> A liquid is an incompressible fluid.
>
> A gas is a compressible fluid.
In lugnet.robotics, Peter Dantic writes:
I think you will find that, with the exception of black hole stuff, everything
is compressible.
It is certainly true to say that a gas is more compressible than a liquid, but
there is no defined 'level of compressibility' that distinguishes a gas from a
liquid.
I think you will find that the TRUE difference between gas & liquid is to do
with the way the stuff is acting at a molecular level - in a gas the molecues
act like my kids at bedtime - they bounce around all over the place, whereas
in a liquid they are all butted up, and just shake around a bit.
Hydraulic relates to liquids.
Pneumatic relates to gasses.
Both gasses & liquids are fluids, tho, which is why fluid dynamics is
concerned with both.
P.Dantic.
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Message has 2 Replies:
 | | Re: Darn those definitions (was: The new Super Car)
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| (...) I think that you will find that fluid is not compressable. If fluid were compressable fish could not live 2 miles down, divers couldn't dive and dolphins and whales would be crushed on their very common 700 foot dives. This is all quite true (...) (25 years ago, 8-Aug-99, to lugnet.robotics)
| | | Re: Darn those definitions (was: The new Super Car)
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| (...) Dear Mister Dantic, I am sure you carefully thought out your statement about compressibility, but I must point out your intolerably egregious oversights. Specifically, here are several things that cannot be compressed: - Massless particles (...) (25 years ago, 10-Aug-99, to lugnet.robotics)
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