States of matter was: New 'electrical active' Armour to defeat hand held anti-tank rounds

Andrae Muys schrieb:
> Scott Siebold wrote:

I usually don't like to tout my credentials, but I've got a Ph.D. in Physics.
With all due respect, I suspect your college Physics teacher used a personal
definition or was talking in a very loose manner. The page quoted by Andrae
Muys
http://www.ualberta.ca/~bderksen/florin.html
also has a discussion of 'States of matter' which summarises the standard
definition.

> > A material that is in the superconductive state "ACTS" differently

Only with respect to how it conducts electricity and the consequences thereof.
Things that don't change significantly as you cross the superconductivity
threshold:
- density
- color
- cristalline structure
- hardness
- heat conductivity and capacity etc.
The changes are much smaller than between solid, liquid or gas.

Greetings

KH.Ranitzsch@t-online.de schrieb:
> > > Ah yes quite. Ther are 5 "states" of matter and one

Could it be that you actually mean a 'superfluid'? Close to absolute zero,
liquid Helium becomes a superfluid whose behaviour differs significantly from
normal liquids. The changes to its bulk properties are dramatic enough to
justify calling it a new state of matter:

See:
http://www.eng.vt.edu/fluids/msc/super/super-f.htm
http://www.aip.org/physnews/graphics/html/helium3.htm
http://london.ucdavis.edu/~zieve/Research/super1.html
http://www.guenthernet.com/helium/index_helium.html
http://www.lassp.cornell.edu/Nobel/science.html
http://www.lassp.cornell.edu/Nobel/ORL_Paper.html

Or a web search on 'Superfluid'.

Greetings