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Old 08-12-2008, 08:59 PM   #31
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Originally Posted by Choguy03 View Post
How much for you glass? i will give you $5 a piece
I've already offered them up to a friend of mine as he uses glass. He's going to take all of them.
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Old 08-12-2008, 09:38 PM   #32
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That was my first thought....but doesn't glass get more and more brittle with age?
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No need to claim, just go look at an old church's stained glass windows. Notice how they are much thicker at the bottom than the top. This is due to the glass "flowing" down over many MANY years.
Actually, that's a myth. The thickness variation in historical glass was an artifact of the manufacturing process, not due to room-temperature flow. The RT flow rate of glass is sufficiently slow that you can essentially assume it doesn't flow at all.

Ask yourself this question: If 300 year-old glass is so much thicker at the bottom, why aren't Egyptian glass artifacts (3,000 years+) puddles yet?

Here are a few links for reference:

http://www.newscientist.com/article/...shattered.html
http://www.math.ucr.edu/home/baez/ph...ass/glass.html
http://dwb.unl.edu/Teacher/NSF/C01/C...indowpane.html
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Old 08-13-2008, 01:15 AM   #33
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Nope



Actually, that's a myth. The thickness variation in historical glass was an artifact of the manufacturing process, not due to room-temperature flow. The RT flow rate of glass is sufficiently slow that you can essentially assume it doesn't flow at all.

Ask yourself this question: If 300 year-old glass is so much thicker at the bottom, why aren't Egyptian glass artifacts (3,000 years+) puddles yet?

Here are a few links for reference:

http://www.newscientist.com/article/...shattered.html
http://www.math.ucr.edu/home/baez/ph...ass/glass.html
http://dwb.unl.edu/Teacher/NSF/C01/C...indowpane.html
See about 10 posts back.
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