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  #31 (permalink)  
Old 27-June-2008, 10:47 PM
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Wow, Geo and I are in the same boat!

Let me pour you one, homey.
Cool. We can be WRONG! together.
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Old 30-June-2008, 08:33 PM
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Cathedral Glass Myth Shattered -- 1998 (512): 2 -- ScienceNOW

Cathedral Glass Myth Shattered. The popular notion that medieval cathedral windows have thickened at the bottom--by slowly flowing like a liquid--doesn't ...
sciencenow.sciencemag.org/cgi/content/full/1998/51...

From the web.
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Old 30-June-2008, 09:34 PM
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Anyone who ever polished a mirror knows pitch flows. If you have to interupt your polishing for a few days you have to re-press the lap on the mirror for proper contact.
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Old 04-July-2008, 08:26 PM
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"Look---up in the sky!..."
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June 22, 2008
Despite its solid appearance, glass is actually a 'jammed' state of matter that moves very slowly...explains why a glass is a glass and not a liquid - or a solid...If a metal could be made to cool with the same internal structure as a glass and without crystal grain boundaries, it would be less likely to fail.
physorg.com
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Old 07-July-2008, 03:27 PM
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"Look---up in the sky!..."
Could you please explain why you posted this?
It is almost word for word the same article that I provided in the OP.
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Old 07-July-2008, 06:31 PM
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Sorry---missed the similarity, despite your quotes, as MSNBC's site tends to lock my computer and so avoid going there.
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Old 07-July-2008, 07:09 PM
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By the way, if anyone is still interested in the state of glass debate, I found this detailed discussion on a Univ. of California - Riverside website. Worth reading for the details, but the conclusion is below.
Quote:
Conclusion

There is no clear answer to the question "Is glass solid or liquid?". In terms of molecular dynamics and thermodynamics it is possible to justify various different views that it is a highly viscous liquid, an amorphous solid, or simply that glass is another state of matter which is neither liquid nor solid. The difference is semantic. In terms of its material properties we can do little better. There is no clear definition of the distinction between solids and highly viscous liquids. All such phases or states of matter are idealisations of real material properties. Nevertheless, from a more common sense point of view, glass should be considered a solid since it is rigid according to everyday experience. The use of the term "supercooled liquid" to describe glass still persists, but is considered by many to be an unfortunate misnomer that should be avoided. In any case, claims that glass panes in old windows have deformed due to glass flow have never been substantiated. Examples of Roman glassware and calculations based on measurements of glass visco-properties indicate that these claims cannot be true. The observed features are more easily explained as a result of the imperfect methods used to make glass window panes before the float glass process was invented.
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Old 07-July-2008, 07:12 PM
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And then, on a completely different tack, there is State v. Glass.
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Old 07-July-2008, 08:25 PM
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I don't see what the difficulty is. A liquid has to be able to flow to take the shape of the container it is placed in in a gravitational field. Give pitch enough time and it will do just that. Glass will never do that. It's an amorphous solid.
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Old 07-July-2008, 09:39 PM
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And then, on a completely different tack, there is State v. Glass.
Glass everywhere!
Quote:
...The man [Terry Glass], who had tools that appeared to be pliers or cutters in his hands, responded, “I don’t want any trouble,” then turned, ran up a ladder, and climbed out a broken window...
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