posted on Aug, 25 2005 @ 09:01 PM
glass has fairly poor thermal transfer properties. in other words, it cant deal with extreme temperature changes. the first thing that comes to mind
is maybe there was some kind of wild temperature swing for whatever reason...
If you throw a mug of hot coffee onto your car windshield in the winter, the windshield will crack, and sometimes shatter. (splash the hot liquid onto
it, dont throw the mug at it
.) the glass is cold, so it is contracted. the heat from the coffee makes the glass expand, but only where the coffee
was splashed. The glass expands so much that it cant deal with the stresses, and cracks.
i am pretty sure the same goes for hot to cold also. for instance taking a glass, and heating it in boiling water, and then immediatly submerging it
into ice water. i am fairly sure your glass will crack..
i dont know how much this helps though...
[edit on 25-8-2005 by Demonic Aura]