1
   

Is glass a liquid or solid?

 
 
Equus
 
Reply Tue 17 May, 2005 10:49 am
I've heard the arguments about glass being a liquid, but it sure seems like a solid to me.
--I wouldn't want to jump into a swimming pool filled with glass.
--You can't wet a postage stamp with glass.
--Two puddles of water touching each other will merge into one puddle, but will two pieces of glass touching each other ever merge?
--Would you rather drive your tires over a puddle of mud or a pile of broken glass?

Sure, over the course of decades & centuries glass sags. But doesn't metal also eventually sag under its own weight?
  • Topic Stats
  • Top Replies
  • Link to this Topic
Type: Discussion • Score: 1 • Views: 823 • Replies: 3
No top replies

 
Acquiunk
 
  1  
Reply Tue 17 May, 2005 11:04 am
Glass does not have a crystal structure, it is an amorphous solid. So technically it is not a true solid. Also glass does not sag, it flows, very slowly. Glass panes in the windows of Medieval Cathedrals have been found to be thicker at the bottom than the top. As the age of the windows is known, the rate of flow can be calculated. In the correct chemical environment glass does form crystals, in which case it flakes. This is what causes the iridescent sheen or patina found on ancient glass that has been recovered in an archaeological context.
0 Replies
 
raprap
 
  1  
Reply Wed 18 May, 2005 07:30 pm
Very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very Viscous liquid (gasp).

Rap
0 Replies
 
old cheese
 
  1  
Reply Sat 21 May, 2005 02:44 pm
Glass is in fact a "supercooled" liquid, which is the name given to any substance which exists in liquid state below its normal freezing point. As described above, its liquid behaviour at room temperature is extremely slow hence we can consider it a transparent solid to all intents and purposes. However it will, under the right conditions, crystallise and so solidify, becoming opaque in the process.

Water will also supercool and when flying your aeroplane through a shower of rain at (say) - 10 degrees C, the droplets hitting your wings instantly change to solid ice causing all sorts of problems!

O.C.
0 Replies
 
 

Related Topics

Evolution 101 - Discussion by gungasnake
Typing Equations on a PC - Discussion by Brandon9000
The Future of Artificial Intelligence - Discussion by Brandon9000
The well known Mind vs Brain. - Discussion by crayon851
Scientists Offer Proof of 'Dark Matter' - Discussion by oralloy
Blue Saturn - Discussion by oralloy
Bald Eagle-DDT Myth Still Flying High - Discussion by gungasnake
DDT: A Weapon of Mass Survival - Discussion by gungasnake
 
  1. Forums
  2. » Is glass a liquid or solid?
Copyright © 2021 MadLab, LLC :: Terms of Service :: Privacy Policy :: Page generated in 0.04 seconds on 11/28/2021 at 09:47:37