planar thickness
21Glossary of graph theory — Graph theory is a growing area in mathematical research, and has a large specialized vocabulary. Some authors use the same word with different meanings. Some authors use different words to mean the same thing. This page attempts to keep up with… …
22Debye sheath — The Debye sheath (also electrostatic sheath) is a layer in a plasma which has a greater density of positive ions, and hence an overall excess positive charge, that balances an opposite negative charge on the surface of a material with which it is …
23Gear — For the gear like device used to drive a roller chain, see Sprocket. This article is about mechanical gears. For other uses, see Gear (disambiguation). Two meshing gears transmitting rotational motion. Note that the smaller gear is rotating… …
24Plane (Dungeons & Dragons) — Ethereal plane redirects here. For the mystical concept, see Etheric plane. The planes of the Dungeons Dragons roleplaying game constitutes the multiverse in which the game takes place. In the earliest versions of Dungeons Dragons, the concept of …
25Wireless energy transfer — or wireless power is the transmission of electrical energy from a power source to an electrical load without artificial interconnecting conductors. Wireless transmission is useful in cases where interconnecting wires are inconvenient, hazardous,… …
26Mindlin–Reissner plate theory — Deformation of a plate highlighting the displacement, the mid surface (red) and the normal to the mid surface (blue) The Mindlin Reissner theory of plates is an extension of Kirchhoff–Love plate theory that takes into account shear deformations… …
27Snow — Snowfall redirects here. For other uses, see Snow (disambiguation) or Snowfall (disambiguation). Snow is a type of precipitation in the form of crystalline water ice, consisting of a multitude of snowflakes that fall from clouds. The process of… …
28Graphene — is a one atom thick planar sheet of sp2 bonded carbon atoms that are densely packed in a honeycomb crystal lattice. It can be viewed as an atomic scale chicken wire made of carbon atoms and their bonds. The name comes from GRAPHITE + ENE;… …
29Beacon sandstone — The Beacon sandstone is a geological formation exposed in Antarctica and deposited from the Devonian to the Triassic ( Ma|400| Ma|225Verify source|date=April 2008). The sandstone was originally described as a formation, and upgraded to group and… …
30Solid oxide fuel cell — A solid oxide fuel cell (SOFC) is an electrochemical conversion device that produces electricity directly from oxidizing a fuel. Fuel cells are characterized by their electrolyte material and, as the name implies, the SOFC has a solid oxide, or… …
