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Re: Glass does not flow



Jim,
I do not URL's to back me up, but glass does not flow (at
ambient temps). It is a result of the glass blowing procedure way back
when. That is why your 130 year old windows look just the same as some
400-500 year old stained glass windows in churches in Europe. These
theory was recently (within the last 2 yrs. or so) reversed. Any
Material Scientists who is up on the latest research knows this.


Sam Held

-----Original Message-----
From: Jim Green [mailto:JMGreen@SISNA.COM]
Sent: Saturday, August 21, 1999 4:49 PM
To: PHYS-L@lists.nau.edu
Subject: Re: Glass does not flow


Here is someone who is learning physics from "Earth&Sky! Wow!

Anyone who thinks that glass doesn't flow is welcome to visit my 130 yr
old
house and look out the windows.

In materials science common glass is clearly thought to be a fluid. It
has
no long range crystalline structure and clearly flows.

Jim Green

At 01:52 PM 8/21/99 -0500, you wrote:
For those of you that think that glass flows under its own weight you
might find this URL a good place to start.
(www.earthsky.com/1997/esmi971014.html) Then go to the links.
Do not feel too bad about holding this common belief. One can even
find
it in Feynman's Lecture Series

David Anderson
DFA@fnal.gov

Jim Green
mailto:JMGreen@sisna.com
http://users.sisna.com/jmgreen