mean free path
51Nanowire — Part of a series of articles on Nanoelectronics Single molecule electronics …
52Vacuum distillation — At atmospheric pressure, dimethyl sulfoxide boils at 189°C. Under a vacuum, it distills off into the connected receiver at only 70°C. Vacuum distillation is a method of distillation whereby the pressure above the liquid mixture to be distilled is …
53Critical mass — This article is about nuclear fission reactions. For other uses, see Critical mass (disambiguation). As part of a re creation of a 1945 criticality accident, a plutonium pit is surrounded by blocks of neutron reflective tungsten carbide. The… …
54Le Sage's theory of gravitation — is the most common name for the kinetic theory of gravity originally proposed by Nicolas Fatio de Duillier in 1690 and later by Georges Louis Le Sage in 1748. The theory proposed a mechanical explanation for Newton s gravitational force in terms… …
55Opacity (optics) — Opacity is the measure of impenetrability to electromagnetic or other kinds of radiation, especially visible light. In radiative transfer, it describes the absorption and scattering of radiation in a medium, such as a plasma, dielectric,… …
56Distillation — Distiller and Distillery redirect here. For other uses, see Distiller (disambiguation) and Distillery (disambiguation). For other uses, see Distillation (disambiguation). Laboratory display of distillation: 1: A heating device 2: Still pot 3:… …
57Vacuum — This article is about empty physical space or the absence of matter. For other uses, see Vacuum (disambiguation). Free space redirects here. For other uses, see Free space (disambiguation). Pump to demonstrate vacuum In everyday usage, vacuum is… …
58Meteoroid — A few shooting stars can be seen in this video from the ISS. A Perseid meteor (light streak somewhat to right of center of photo) and Milky Way. A meteoroid is a sand to …
59Flux — This article is about the concept of flux in science and mathematics. For other uses of the word, see Flux (disambiguation). In the various subfields of physics, there exist two common usages of the term flux, both with rigorous mathematical… …
60Runaway breakdown — is a theory of lightning initiation proposed by Alex Gurevich in 1992.Electrons in air have a mean free path of 1cm. Fast electrons which move at a large fraction of the speed of light have a mean free path up to 100 times longer. Given the long… …
