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Solids
A solid object is in the state of matter characterized by resistance to deformation and changes of volume. more...
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At the microscopic scale, a solid has these properties :
The atoms or molecules that comprise the solid are packed closely together.;
These constituent elements have fixed positions in space relative to each other. This accounts for the solid's rigidity.
If sufficient force is applied, either of these properties can be violated, causing permanent deformation.;
;
Because any solid has some thermal energy, its atoms vibrate. However, this movement is very small and very rapid, and cannot be observed or felt under ordinary conditions.;
The branch of physics that deals with solids is called solid-state physics, and is a type of condensed matter physics. Materials science is primarily concerned with properties of solids such as strength and phase transformations. It overlaps strongly with solid state physics. Solid-state chemistry overlaps both of these fields, but is especially concerned with the synthesis of novel materials.
The lightest known solid is man-made and is called aerogel. The lightest aerogel produced has a density of 1.9 mg/cm3 or 1.9 kg/m3 (1/530 as dense as water).
We encounter many solids in our every day lives. Some examples of solids are ice, wood, plastic, and more.
Another defenition of the word solid, a more philosophical defenition, is any substance, that when placed between to objects that are pushing at each other, will not let there surfaces meet, unless the substance is moved left, right, up, or down. Therefore, water is as much a solid as wood, because it has the properties that I have already stated. The defenition used in physics is more pretaining to the Hardness of an object, the simple idea that is created when a person touches an object with an part of there body. For more on the subject, I would recomend John Locke's book "An Essay on Human Understanding".
Read more at Wikipedia.org
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