Solid | Wikipedia audio article
Channel: wikipedia tts
Date: 08/12/2018

This is an audio version of the Wikipedia Article:
Solid


00:01:09 1 Microscopic description
00:03:03 2 Classes of solids
00:03:50 2.1 Metals
00:06:26 2.2 Minerals
00:07:38 2.3 Ceramics
00:12:08 2.4 Glass ceramics
00:13:31 2.5 Organic solids
00:14:10 2.5.1 Wood
00:15:07 2.5.2 Polymers
00:17:11 2.6 Composite materials
00:19:29 2.7 Semiconductors
00:20:39 2.8 Nanomaterials
00:22:29 2.9 Biomaterials
00:23:16 3 Physical properties
00:23:54 3.1 Mechanical
00:26:41 3.2 Thermal
00:27:30 3.3 Electrical
00:29:21 3.3.1 Electro-mechanical
00:30:20 3.4 Optical
00:32:11 3.4.1 Opto-electronic



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SUMMARY
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Solid is one of the four fundamental states of matter (the others being liquid, gas, and plasma). In solids molecules are closely packed. It is characterized by structural rigidity and resistance to changes of shape or volume. Unlike  liquid, a solid object does not flow to take on the shape of its container, nor does it expand to fill the entire volume available to it like a gas does. The atoms in a solid are tightly bound to each other, either in a regular geometric lattice (crystalline solids, which include metals and ordinary ice) or irregularly (an amorphous solid such as common window glass). Solids cannot be compressed with little pressure whereas gases can be compressed with little pressure because in gases molecules are loosely packed.
The branch of physics that deals with solids is called solid-state physics, and is the main branch of condensed matter physics (which also includes liquids). Materials science is primarily concerned with the physical and chemical properties of solids. Solid-state chemistry is especially concerned with the synthesis of novel materials, as well as the science of identification and chemical composition.