is glass a liquid or a solid?
151415
It is sometimes said that glass in very old churches is thicker at the bottom than at the top because glass is a liquid, and so over several centuries it has flowed towards the bottom.  This is not true.  In Mediaeval times panes of glass were often made by the Crown glass process.  A lump of molten glass was rolled, blown, expanded, flattened and finally spun into a disc before being cut into panes.  The sheets were thicker towards the edge of the disc and were usually installed with the heavier side at the bottom.  Other techniques of forming glass panes have been used but it is only the relatively recent float glass processes which have produced good quality flat sheets of glass.\n\nTo answer the question "Is glass liquid or solid?" we have to understand its thermodynamic and material properties.\n\nThermodynamics of glass\n\nThere is still much about the molecular physics and thermodynamics of glass that is not well understood, but we can give a general account of what is thought to be the case.\n\nMany solids have a crystalline structure on microscopic scales.  The molecules are arranged in a regular lattice.  As the solid is heated the molecules vibrate about their position in the lattice until, at the melting point, the crystal breaks down and the molecules start to flow.  There is a sharp distinction between the solid and the liquid state, that is separated by a first order phase transition, i.e. a discontinuous change in the properties of the material such as density.  Freezing is marked by a release of heat known as the heat of fusion. \n...\nConclusion\n\nThere is no clear answer to the question "Is glass solid or liquid?".  In terms of molecular dynamics and thermodynamics it is possible to justify various different views that it is a highly viscous liquid, an amorphous solid, or simply that glass is another state of matter which is neither liquid nor solid.  The difference is semantic.  In terms of its material properties we can do little better.  There is no clear definition of the distinction between solids and highly viscous liquids.  All such phases or states of matter are idealisations of real material properties.  Nevertheless, from a more common sense point of view, glass should be considered a solid since it is rigid according to every day experience.  The use of the term "supercooled liquid" to describe glass still persists, but is considered by many to be an unfortunate misnomer that should be avoided.  In any case, claims that glass panes in old windows have deformed due to glass flow have never been substantiated.  Examples of Roman glassware and calculations based on measurements of glass visco-properties indicate that these claims cannot be true.  The observed features are more easily explained as a result of the imperfect methods used to make glass window panes before the float glass process was invented.
238505
I'm not sure to what extend should I answer this. But just what I have in mind and I think might be related. \n-The molecules within the ball are closely packed together (they interact with one another) ; and this what gives solid their firm/fixed shape.\n-The energy of the molecules is low compared to energy of molecules of liquid or gas.The molecules basically stay fixed on their position and vibrate with minimum amplitude.\n\nThat's mostly about physics for ball. I'll add more if I remember more. Cheers
598488
Solid.  If the temperature is below the melting point, then it will be a solid.  Unless you want to get into changing pressures, or something.
780172
Teacher is wrong. This is a popular misconception, but the usually cited "proof", that old windows are thicker at the bottom, only proves that old glass was irregular in thickness. A smart glazier would install a pane thick edge down for better strength.\n\nEvidence to the contrary includes the fact that large telescope mirrors and lenses, which must be figured  to within less than 100 nanometers (4 micro-inches), maintain this figure indefinitely. Telescopes over 100 years old are still in use. Also, glass artifacts over 3000 years old still hold their shape.\n\nThis misconception arises because glass, being an amorphous, as opposed to crystalline solid, has no clearly defined melting point. However, at temperatures below the glass transition temperature, glass is most definitely solid. Actually, metals exhibit more "liquid" behavior than glass does, because they will creep under load, something glass does not do.
1178623
solid's particles are compact, while on liquids they are loose but gas' are the most loose (more distances with each other)
953035
a) pseudo solid. An example would be when you mix a lot of corn starch to water, creating a matrix. When you stir it quickly, it cracks and breaks, but when you stir it slowly, it behaves as a liquid. So this pseudo solid has some solid properties, but really is a colloid liquid.\nb) Annealing. (metallurgy), a heat treatment that alters the microstructure of a material causing changes in properties such as strength and hardness. This process is done for steel and other alloys in machining high quality parts for aeronautics, tooling, etc.
57967
a sol is colloid in which solid is dispersed in liquid.
957050
all things have a solid liquid and gas state. it just depends on the temperature.
646733
glass has the property to transmit light from one side to the other side of it. other objects stop the light..or atleast do not pass the light fully.. thats why glass is tranparent to the other side
832073
Glass is made of sandstone.  Stone would be earth.
949274
in a liquid-they have no distinct order and move freely but cramped.\nin a solid-they are in a fixed position.\nin a gas-they move freely and are extremely active\nin plasma- they move like gasses and liquids
473094
Glass is more dimensionally stable - it doesn't expand or contract when the temperature changes - and it can be polished to a very smooth surface.   The finish is a very very thin layer of metal.\n\nRead "The Perfect Machine" by Ronald Florence if you want to learn more.
32278
you bet.  the old "solid, liquid, gas" classification is about as accurate as saying "animal, vegetable or mineral".  many substances DO fit into these categories, but these days there are a lot of forms of matter that do not fit neatly into any of them.\n\nthere are multiple types of solids:\n-crystalline solids\n-polycrystalline solids\n-amorphous solids\n\nmultiple types of liquids:\n-plain ol' regular liquids\n-solutions\n-superfluids\n\nmultiple types of gases:\n-plain ol' regular gases\n-plasma (ionized gas)\n\nand there are a lot of unusual forms of matter that don't fall neatly into these categories:\n-colloids (suspensions of particles in a fluid)\n-gels\n-quantum condensates (bose-einstein or fermionic condensates)\n-supersolids\n-some exotic ones found in high-energy and astro- physics, like neutron condensates, quark-gluon plasma, degenerate matter and strange matter\n\nthere are also some other types of thermodynamic phases:\n-the various kinds of magnetism (ferromagnetism, ferrimagnetism, antiferromagnetism, paramagnetism) are considered thermodynamic phases\n-when a material becomes superconducting it involves a phase transition of the electrons in the material\n\nand certainly there are others.  all of this depends on how you define a "form of matter."\n\nwikipedia has a list, though it is not complete:\nhttp://en.wikipedia.org/wiki/Phases_of_matter\n\ncheers
293478
both will have a miniscus and this is due to the adhesive property of water. the cohesive property keeps the water molecules togherter but the adhesive props allow for movement as in a cappilary tube. the gLass is clearer than the plastic so im thinking glass
672330
Glass is made from silica and sand, heated at very high temperatures.  Different colors come from adding different metals and other elements.
84127
No....glass is considered an amorphic substance. In other words, its structure looks the same in all directions from within the material.
648266
liquid? if u mean state of matter.