gas plenum
41Nuclear power — Atomic Power redirects here. For the film, see Atomic Power (film). This article is about the power source. For nation states that are nuclear powers, see List of states with nuclear weapons …
42X-ray fluorescence — (XRF) is the emission of characteristic secondary (or fluorescent) X rays from a material that has been excited by bombarding with high energy X rays or gamma rays. The phenomenon is widely used for elemental analysis and chemical analysis,… …
43Mass in general relativity — General relativity Introduction Mathematical formulation Resources Fundamental concepts …
44Richard Liboff — Richard L. Liboff is a U.S. physicist who has authored five books and nearly 150 other publications in variety of fields, including plasma physics, planetary physics, cosmology, quantum chaos, and quantum billiards.He earned his Ph.D., 1961 from… …
45William R. Bennett, Jr. — William R. Bennett (January 30, 1930 June 29, 2008) was an American physicist known for his pioneering work on gas lasers. He spent most of his career on the faculty of Yale University.CareerBennett s graduate work in physics was on spectroscopy… …
46Acoustic microscopy — Introduction = Acoustic microscopes employ very high or ultra high frequency ultrasound. These microscopes operate nondestructively and penetrate most solid materials to make visible images of internal features, including defects such as cracks,… …
47Hidrógeno — Este artículo trata sobre un elemento químico. Para la molécula (H2), formada por dos átomos de hidrógeno, véase Dihidrógeno. Para otros usos de este término véase Hidrógeno (desambiguación). ← Hidrógeno → Helio …
48Спирты — Отличительная особенность спиртов  гидроксильная группа при насыщенном атоме углерода  на рисунке выделена красным (кислород) и серым цветом (водород). Спирты (от лат.  …
49Volksgesetzgebung in Hamburg — Die Volksgesetzgebung in der Freien und Hansestadt Hamburg, als Element der direkten Demokratie des Landes, wurde neuerlich 1996 eingeführt. Sie besteht neben den bisherigen Instrumenten der repräsentativen Demokratie (Indirekte Demokratie), der… …
50Chronology — SOVIET ERA (1917 1985) 1917 February: Bread riots in Petrograd (“February Revolution”). March: Abdication of Nicholas II; establishment of the Provisional Government and election of the Soviet of Workers’ Deputies. 16 April: Vladimir Lenin… …
