vacuum alloy
91Barometer — Schematic drawing of a simple mercury barometer with vertical mercury column and reservoir at base …
92Gong — Tamtam redirects here. For other uses, see Tamtam (disambiguation). This article is about the musical instrument. For other uses, see Gong (disambiguation). See also: slit gong A gong collection in a Gamelan ensemble of instrum …
93molybdenum processing — Introduction preparation of the ore for use in various products. Molybdenum (Mo) is a white, platinum like metal with a melting point of 2,610° C (4,730° F). In its pure state, it is tough and ductile and is characterized by moderate… …
94petroleum refining — Introduction conversion of crude oil into useful products. History Distillation of kerosene and naphtha The refining of crude petroleum owes its origin to the successful drilling of the first oil well in Titusville, Pa., in 1859. Prior to… …
95Permittivity — A dielectric medium showing orientation of charged particles creating polarization effects. Such a medium can have a higher ratio of electric flux to charge (permittivity) than empty space In electromagnetism, absolute permittivity is the measure …
96X-ray photoelectron spectroscopy — [ right|thumb|350px|Basic components of a monochromatic XPS system.] X ray photoelectron spectroscopy (XPS) is a quantitative spectroscopic technique that measures the elemental composition, empirical formula, chemical state and electronic state… …
97particle accelerator — accelerator (def. 7). [1945 50] * * * Device that accelerates a beam of fast moving, electrically charged atoms (ions) or subatomic particles. Accelerators are used to study the structure of atomic nuclei (see atom) and the nature of subatomic… …
98Electron microscope — Diagram of a transmission electron microscope A 197 …
99Compact disc manufacturing — is the process by which commercial compact discs (CDs) are replicated in mass quantities using a master version created from a source recording. This may be either in audio form (CD Audio) or data form (CD ROM). This process is used in the… …
100Glass-to-metal seal — Glass to metal seals are a very important element of the construction of vacuum tubes, electric discharge tubes, incandescent light bulbs, glass encapsulated semiconductor diodes, reed switches, pressure tight glass windows in metal cases, and… …
