emitter classification unit
11Mathematics and Physical Sciences — ▪ 2003 Introduction Mathematics Mathematics in 2002 was marked by two discoveries in number theory. The first may have practical implications; the second satisfied a 150 year old curiosity. Computer scientist Manindra Agrawal of the… …
12Outline of astronomy — Mauna Kea in Hawaii is one of the world s premier observatory sites. Pictured is the W. M. Keck Observatory, an optical interferometer. The following outline is provided as an overview of and topical guide to astronomy: Astronomy – studies the… …
13X-ray machine — An X ray machine is a device used by radiographers to acquire an x ray image. They are used in various fields, notably medicine and security.HistoryShay M. Anderson and Ryan W. Preuninger formulated mathematical equations for X rays. Physicist… …
14Portland cement — is the most common type of cement in general usage in many parts of the world, as it is a basic ingredient of concrete, mortar, stucco and most non specialty grout. It is a fine powder produced by Portland cement clinker (more than 90%), a… …
15C-12 Huron — Infobox Aircraft name= C 12 Huron caption= C 12F Huron type= Civil utility aircraftmanufacturer= Beechcraft designer= first flight= introduced= retired= status= Active service primary user= United States Air Force more users= United States Army… …
16Voltage divider — In electronics, a voltage divider (also known as a potential divider) is a simple linear circuit that produces an output voltage ( V out) that is a fraction of its input voltage ( V in). Voltage division refers to the partitioning of a voltage… …
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