2006-12-02 16:43:48 · 10 answers · asked by bitrus d 1 in Science & Mathematics ➔ Physics
There's a belief that glass is a liquid with infinite vicosity, meaning that it flows extremely slowly. There's no real evidence for it, though.
2006-12-02 16:48:05 · answer #1 · answered by Joy M 7 · 2⤊ 1⤋
Some people mistakenly think glass is a very viscous liquid, possibly because, as an amorphous solid, it doesn't have a clearly defined melting point. The usually cited proof is that old window panes are thicker at the bottom than at the top. But this is because old glass varied in thickness, and a smart glazier would install panes thick edge down for better strength.
Counter-examples include the fact that there are 3000-year-old glass artifacts that still have their shape, and that hundred-year-old telescopes still work fine, whereas if the glass flowed a hundred-thousandth of an inch the lens or mirror would be ruined.
2006-12-02 17:00:21 · answer #2 · answered by injanier 7 · 1⤊ 0⤋
Glass is not a liquid.
In a liquid atoms and molecules are mobile, while for practical purposes in a glass they are not. However, glasses do flow (but then so does lead), this being most visible in the sagging of old windows (modern glasses do not flow nearly as much). This leads some to unfairly treat glasses as a liquid,even though they do not treat lead as one.
2006-12-02 19:30:50 · answer #3 · answered by Anonymous · 0⤊ 0⤋
Glass like other familiar substances is a solid. When heated to high temperature it becomes liquid.
But glass is amorphous solid. The meaning of amorphous is “with out form”.
By this one should not come to a hasty conclusion that glass has no form.
The word is used to distinguish it from regular crystalline bodies. That is the shape of the crystal is not regular.
Amorphous solids are antitheses of regular crystalline bodies.
Thus it is wrong to say that glass is a liquid.
Amorphous solids do not have a fixed melting point but have a range of melting points.
2006-12-02 21:40:17 · answer #4 · answered by Pearlsawme 7 · 0⤊ 0⤋
People often argue that glass does actually flow. However, they claim that the flow takes an extremely long time.
See the following link for a very detailed explaination.
2006-12-02 16:54:09 · answer #5 · answered by wilkes_in_london 3 · 1⤊ 0⤋
in the factory the glass is so hot it can be poured in molds of any shape , hence liquid glass, or as u now poured glass...... to see liquid glass go watch a glass blower at work.
2006-12-02 17:20:47 · answer #6 · answered by Anonymous · 0⤊ 0⤋
it does flow look at a really old window it will be thick at the bottom and thin on top, this is gravity causing the glass to flow downwards it just moves very slowly
2006-12-02 16:48:57 · answer #7 · answered by Anonymous · 2⤊ 0⤋
Glass is the hardest moving liquid in the world , I have seen many old window pains that were old and saggy drippy glass.Look at the attic windows in old victorian homes. you may see some orig. old sagging glass.
2006-12-02 16:56:40 · answer #8 · answered by bricyns 1 · 0⤊ 1⤋
My Science teacher said that in due course of time, we observe that the window glasses become thicker at the bottem.
Swamy
2006-12-03 02:46:30 · answer #9 · answered by K N Swamy 3 · 0⤊ 1⤋
The Catholic faith isn't the only faith. There are countless religions that have faith that they have got the only actual faith; meaning that in the event that they're actual Catholic's pass to hell for not following the meant actual faith. Wow a remarkable style of persons spoke back quickly in this one. Catholics have faith that any one who does not stick to their ideals is going to hell so it is basically honest.
2016-12-18 06:36:24 · answer #10 · answered by ? 4 · 0⤊ 0⤋