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English Wikipedia references for Ac.ru 41-60 of 323
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| Bismuth Talk:Bismuth | |
| Ammonium nitrate The chemical compound ammonium nitrate, the nitrate of ammonia with the chemical formula NH4NO3, is a white crystalline solid at room temperature and standard pressure. It is commonly used in agriculture as a high-nitrogen fertilizer, and it has also been used as an oxidizing agent in explosives, including improvised explosive devices.Ammonium nitrate is used in cold packs, as hydrating the salt is an endothermic process. Ammonium_nitrate | |
| Robert Plant Robert Anthony Plant CBE (born 20 August 1948), is an English rock singer and songwriter, famous for his membership in the former rock band Led Zeppelin as the lead vocalist and lyricist, as well as for his successful solo career. In 2007, he released an album, Raising Sand, produced by T-Bone Burnett with American bluegrass soprano Alison Krauss, which won the 2009 Grammy Award for Album of the Year for their 2007 effort. Robert_Plant | |
| Jimmy Page James Patrick Page OBE (born 9 January 1944) is an English guitarist, composer and record producer. He began his career as a studio session guitarist in London and was subsequently a member of The Yardbirds from 1966 to 1968, after which he co-founded the English rock band Led Zeppelin.Page has been described as "unquestionably one of the all-time most influential, important, and versatile guitarists and songwriters in rock history". Jimmy_Page | |
| Speed of sound Sound is a vibration that travels through an elastic medium as a wave. The speed of sound describes how far this wave travels in a given amount of time. In dry air at , the speed of sound is . This equates to or about one mile in five seconds. This figure for air (or any given gas) increases with gas temperature (equations are given below), but is nearly independent of pressure or density for a given gas. Speed_of_sound | |
| Swan Song Records Swan Song Records was a record label launched by English rock group Led Zeppelin on May 10, 1974. It was managed by Led Zeppelin's manager Peter Grant and was a vehicle for the band to promote its own products as well as sign artists who found it difficult to win contracts with other major labels. The decision to launch the label came after Led Zeppelin's five year contract with Atlantic Records expired at the end of 1973. Atlantic Records ultimately distributed the label's product. Swan_Song_Records | |
| Spin glass spin glass is a magnet with frustrated interactions, augmented by stochastic disorder, where usually ferromagnetic and antiferromagnetic bonds are randomly distributed. Its magnetic ordering resembles the positional ordering of a conventional, chemical glass.Spin glasses display many metastable structures leading to a plenitude of timesimulations. Spin_glass | |
| Loop quantum gravity Loop quantum gravity (LQG), also known as loop gravity and quantum geometry, is a proposed quantum theory of spacetime which attempts to reconcile the theories of quantum mechanics and general relativity. Loop Quantum Gravity suggests that space (i.e. the universe) can be viewed as an extremely fine fabric or network “weaved” of finite quantised loops (of excited gravitational fields) called spin networks. Loop_quantum_gravity | |
| CiteSeer CiteSeer was a public search engine and digital library for scientific and academic papers. It is being replaced by CiteSeerx. It was created by researchers Steve Lawrence, Kurt Bollacker and Lee Giles while they were at the NEC Research Institute (now NEC Labs), Princeton, New Jersey, USA. CiteSeer | |
| John Bonham John Henry "Bonzo" Bonham (31 May 1948 – 25 September 1980) was an English drummer and member of the band Led Zeppelin. He was renowned for his power, fast right foot, distinctive sound and "feel" for the groove. Bonham is described by the Encyclopædia Britannica as "the perfect model for all hard rock drummers that have followed him". John_Bonham | |
| Glycerol Glycerol is a chemical compound also commonly called glycerin or glycerine. It is a colorless, odorless, viscous liquid that is widely used in pharmaceutical formulations. For human consumption, glycerol is classified by the FDA among the sugar alcohols as a caloric macronutrient. Glycerol | |
| Spin network physics, a spin network is a type of diagram which can be used to represent states and interactions between particles and fields in quantum physics. From a mathematical perspective, the diagrams are a concise way to represent multilinear functions and functions between representations of matrix groups. Spin_network | |
| Hawking radiation Hawking radiation (also known as Bekenstein-Hawking radiation) is a thermal radiation with a black body spectrum predicted to be emitted by black holes due to quantum effects. It is named after the physicist Stephen Hawking who provided the theoretical argument for its existence in 1974, and sometimes also after the physicist Jacob Bekenstein who predicted that black holes should have a finite, non-zero temperature and entropy. Hawking_radiation | |
| Graviton Talk:Graviton | |
| Doubly-special relativity Doubly-special relativity (DSR)— also called deformed special relativity or, by some, extra-special relativity — is a modified theory of special relativity in which there is not only an observer-independent maximum velocity (the speed of light), but an observer-independent minimum length (the Planck length). Doubly-special_relativity | |
| Greisen–Zatsepin–Kuzmin limit Greisen-Zatsepin-Kuzmin limit (GZK limit) is a theoretical upper limit on the energy of cosmic rays from distant sources. Greisen–Zatsepin–Kuzmin_limit | |
| Maxwell's demon Talk:Maxwell's_demon | |
| Hamiltonian mechanics Hamiltonian mechanics is a reformulation of classical mechanics that was introduced in 1833 by Irish mathematician William Rowan Hamilton. It arose from Lagrangian mechanics, a previous reformulation of classical mechanics introduced by Joseph Louis Lagrange in 1788, but can be formulated without recourse to Lagrangian mechanics using symplectic spaces (see Mathematical formalism, below). Hamiltonian_mechanics | |
| The Battle of Evermore "The Battle of Evermore" is an acoustic guitar and mandolin song by the English rock band Led Zeppelin, featured on their untitled fourth album, released in 1971. The_Battle_of_Evermore | |
| Quark star A quark star or strange star is a hypothetical type of exotic star composed of quark matter, or strange matter. These are ultra-dense phases of degenerate matter theorized to form inside particularly massive neutron stars. It is theorized that when the neutron-degenerate matter which makes up a neutron star is put under sufficient pressure due to the star's gravity, the individual neutrons break down into their constituent quarks, up quarks and down quarks. Quark_star |
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