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Author Topic: Is glass a liquid?  (Read 7421 times)

John Doubell

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Is glass a liquid?
« on: 29/01/2009 21:30:02 »
John Doubell  asked the Naked Scientists:
   
Dear Chris
 
I listen to your show on 702 in South Africa as often as I can on Friday mornings and am hugely impressed at the range of your knowledge.
 
I appreciate that you must be extremely busy and will not be too miffed if you cannot reply.
 
I was recently in the Karoo (arid, desert like area in the Cape ) and at an extremely old house I noticed that the window panes were bulging slightly on either side at the bottom. I asked the farmer if he knew the reason and he said that glass was essentially a liquid and over time would run and settle, almost like toffee. Was he correct?

Kind Regards
JOHN DOUBELL

What do you think?


 

Offline Chemistry4me

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Is glass a liquid?
« Reply #1 on: 29/01/2009 22:49:12 »
Was it stained glass? I think it is more to do with the window not being fitted properly.
 

Offline Karsten

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Is glass a liquid?
« Reply #2 on: 02/02/2009 22:18:23 »
I heard that too. Glass is supposed to be a liquid not a solid. Older glass often is wavy as if it is slowly running downhill. I wonder if it has to do with the process of making it though. Maybe they learned how to make it completely flat just a little while ago. The windows in my 100 year old house are quite wavy. Clear glass, by the way.
 

Offline Chemistry4me

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Is glass a liquid?
« Reply #3 on: 02/02/2009 22:42:58 »
If the glass is held in place tightly, it should stay flat.
 

Offline JnA

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Is glass a liquid?
« Reply #4 on: 02/02/2009 22:47:07 »
I agree that's it's probably more the process of window making that has caused the inconsistency. If I were hanging a pane of glass and one end was clearly heavier or bulkier, common sense would tell me to place that end at the bottom.
 

Offline Chemistry4me

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Is glass a liquid?
« Reply #5 on: 02/02/2009 22:57:16 »
If I were hanging a pane of glass and one end was clearly heavier or bulkier, common sense would tell me to place that end at the bottom.
Why? ???
 

Offline erickejah

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Is glass a liquid?
« Reply #6 on: 03/02/2009 03:22:07 »
Something about that was explained in history channel, I wish I remember what they said.  :-\ "i have to stop using my wi-fi" [:-'(]
 

Offline Chemistry4me

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Is glass a liquid?
« Reply #7 on: 03/02/2009 03:25:46 »
Haha, you and your history channel :D what about the discovery channel?
 

Offline erickejah

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Is glass a liquid?
« Reply #8 on: 03/02/2009 04:11:25 »
Haha, you and your history channel :D what about the discovery channel?
nope is an absolute distraction for my studies, then i have to struggle with my time.  :-\
 

Offline Chemistry4me

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Is glass a liquid?
« Reply #9 on: 03/02/2009 04:12:57 »
Don't you have to head off to bed too?
 

Offline erickejah

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Is glass a liquid?
« Reply #10 on: 03/02/2009 04:16:53 »
Don't you have to head off to bed too?
i need to finish my homework 1st.  :-\
 

Offline Chemistry4me

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Is glass a liquid?
« Reply #11 on: 03/02/2009 04:18:17 »
You haven't finished your homework?!!! What time is it there?
 

Offline erickejah

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Is glass a liquid?
« Reply #12 on: 03/02/2009 04:18:59 »
You haven't finished your homework?!!! What time is it there?
11:20pm
 

Offline Chemistry4me

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Is glass a liquid?
« Reply #13 on: 03/02/2009 04:20:25 »
Well, you had better get your homework done then buddy. :)
 

Offline erickejah

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Is glass a liquid?
« Reply #14 on: 03/02/2009 04:27:22 »
yep. 2.99792854*10^8
 

Offline Chemistry4me

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Is glass a liquid?
« Reply #15 on: 03/02/2009 04:28:07 »
Speed of light?
----
In a vacuum
« Last Edit: 03/02/2009 04:30:02 by Chemistry4me »
 

Offline Bored chemist

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Is glass a liquid?
« Reply #16 on: 03/02/2009 08:47:49 »
Glass bottles from Roman times are still bottle shaped. Glass doesn't flow.
 

Offline erickejah

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Is glass a liquid?
« Reply #17 on: 03/02/2009 23:02:24 »
Speed of light?
----
In a vacuum

sip, and 1 meter= to 1/2.99792458*10^8, i think ::)
*In a vacuum
 

Offline erickejah

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Is glass a liquid?
« Reply #18 on: 03/02/2009 23:03:17 »
 

Offline erickejah

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Is glass a liquid?
« Reply #19 on: 03/02/2009 23:04:30 »
Glass bottles from Roman times are still bottle shaped. Glass doesn't flow.
were the bottles buried?
 

Offline Chemistry4me

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Is glass a liquid?
« Reply #20 on: 03/02/2009 23:06:34 »
Nah, they were kept in a COOL wine cellar.
 

Offline erickejah

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Is glass a liquid?
« Reply #21 on: 03/02/2009 23:40:54 »
 >:(. is because the pressure of the earth may have kept its shape, like a cast mold...

Quote
Glasses are solids whose structure is essentially that of a liquid, with atoms arranged randomly instead of in the ordered patterns of a crystal. Generally, they are produced by quickly cooling a material from a molten state, a process called quenching.
from:http://web.mit.edu/newsoffice/2008/metallic-glass-1218.html
 

Offline Chemistry4me

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Is glass a liquid?
« Reply #22 on: 03/02/2009 23:42:10 »
I was kidding! :D I don't really know!
 

Offline JnA

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Is glass a liquid?
« Reply #23 on: 05/02/2009 21:50:58 »
If I were hanging a pane of glass and one end was clearly heavier or bulkier, common sense would tell me to place that end at the bottom.
Why? ???


um, so I don't get clonked on the head trying to hang it. Would you put the thicker, weightier end at the top?
 

Offline Chemistry4me

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Is glass a liquid?
« Reply #24 on: 05/02/2009 21:52:38 »
What do you mean exactly by "hanging a pane of glass"? ????????????Cause I have no idea ????????????
 

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Is glass a liquid?
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