Welcome to
Science a GoGo's
Discussion Forums
Please keep your postings on-topic or they will be moved to a galaxy far, far away.
Your use of this forum indicates your agreement to our terms of use.
So that we remain spam-free, please note that all posts by new users are moderated.


The Forums
General Science Talk        Not-Quite-Science        Climate Change Discussion        Physics Forum        Science Fiction

Who's Online Now
0 members (), 181 guests, and 2 robots.
Key: Admin, Global Mod, Mod
Latest Posts
Top Posters(30 Days)
Previous Thread
Next Thread
Print Thread
Joined: Oct 2004
Posts: 4,136
D
Megastar
OP Offline
Megastar
D
Joined: Oct 2004
Posts: 4,136
Supercomputer simulations by two Sandia researchers have significantly altered the theoretical diagram universally used by scientists to understand the characteristics of water at extreme temperatures and pressures.

The new computational model also expands the known range of water?s electrical conductivity.

The Sandia theoretical work showed that phase boundaries for ?metallic water? ? water with its electrons able to migrate like a metal?s ? should be lowered from 7,000 to 4,000 kelvin and from 250 to 100 gigapascals.

(A phase boundary describes conditions at which materials change state ? think water changing to steam or ice, or in the present instance, water ? in its pure state an electrical insulator ? becoming a conductor.)

For more:
http://www.sciencedaily.com/releases/2006/10/061004180104.htm


DA Morgan
.
Joined: Aug 2006
Posts: 9
C
Junior Member
Offline
Junior Member
C
Joined: Aug 2006
Posts: 9
sweet


Carling N. Repass
Joined: Dec 2004
Posts: 134
A
Senior Member
Offline
Senior Member
A
Joined: Dec 2004
Posts: 134
nice find; thanx dano

Joined: Mar 2006
Posts: 84
P
Member
Offline
Member
P
Joined: Mar 2006
Posts: 84
Since we're talking about neptune wouldn't we
be looking at polymorphic ice???
I remember a bit about this, (eight or more forms?),
but had trouble finding it.
Came up with this though:
http://cat.inist.fr/?aModele=afficheN&cpsidt=1096194

Joined: Oct 2004
Posts: 4,136
D
Megastar
OP Offline
Megastar
D
Joined: Oct 2004
Posts: 4,136
Depends on the pressure. And Neptune is big enough that the density will cover a large range of values.


DA Morgan
Joined: Oct 2006
Posts: 1,164
Megastar
Offline
Megastar
Joined: Oct 2006
Posts: 1,164
The article mentions that the pressures found on Neptune do fall within the newly calculated phase limits. It sounds like they didn't before. ~samwik


Pyrolysis creates reduced carbon! ...Time for the next step in our evolutionary symbiosis with fire.
Joined: Oct 2004
Posts: 4,136
D
Megastar
OP Offline
Megastar
D
Joined: Oct 2004
Posts: 4,136
That is my understanding.

Refined calculations changed the range of pressures believed to exist within the planet.


DA Morgan

Link Copied to Clipboard
Newest Members
debbieevans, bkhj, jackk, Johnmattison, RacerGT
865 Registered Users
Sponsor

Science a GoGo's Home Page | Terms of Use | Privacy Policy | Contact UsokÂþ»­¾W
Features | News | Books | Physics | Space | Climate Change | Health | Technology | Natural World

Copyright © 1998 - 2016 Science a GoGo and its licensors. All rights reserved.

Powered by UBB.threads™ PHP Forum Software 7.7.5