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  • |conflict=Battles of Lexington and Concord |partof=the [[American Revolutionary War]]
    64 KB (10,510 words) - 16:23, 24 May 2016
  • ... common musical root around the thirteenth century, with the establishment of the Islamic Delhi Sultanate in the north. Hindustani music is considered to ... vary. Music remains fundamental to the lives of Indians today as a source of religious inspiration, cultural expression and pure entertainment.
    31 KB (4,728 words) - 16:32, 1 November 2018
  • ... Navy]] defeated a Japanese attack against Midway Atoll (located northwest of [[Hawaii (island)|Hawaii]]) and destroyed four Japanese aircraft carriers a ...ib/ships/carriers/midway.html A Brief History of Aircraft Carriers: Battle of Midway.] Retrieved February 9, 2009.</ref>
    42 KB (6,602 words) - 22:02, 17 August 2019
  • |Litigants=Brown vs. Board of Education of Topeka |FullName=Oliver Brown et al. v. Board of Education of Topeka et al.
    26 KB (3,871 words) - 22:48, 6 July 2016
  • {{Two other uses|underwater sound propagation|atmospheric sounding|SODAR||}} ... equipment used to generate and receive the sound. The study of underwater sound is known as [[underwater acoustics]] or sometimes [[hydroacoustics]].
    47 KB (7,317 words) - 15:34, 11 October 2015
  • ...(force)|lifted]] and propelled by one or more horizontal rotors&mdash;each of which comprises two or more rotor blades. Helicopters are classified as rot ...f greater mechanical complexity, greater cost to buy and operate, and less speed, range, and payload capability.
    42 KB (6,712 words) - 15:45, 14 December 2017
  • ...to distinguish airplanes from [[rotary-wing aircraft]], where the movement of the wing-surfaces generates lift. ...o be "fixed-wing." Some aircraft use fixed wings to provide lift only part of the time, and may or may not be referred to as fixed-wing.
    20 KB (3,021 words) - 00:57, 13 February 2019
  • ...empty but contains electromagnetic waves and particles that pop in and out of existence. The differences between free space and the quantum vacuum are pr ==Properties of ''free space''==
    15 KB (2,211 words) - 16:29, 10 May 2017
  • ...[heat]]ing the bulk material where fission takes place). Fission is a form of [[Nuclear transmutation|elemental transmutation]] because the resulting fra ...r fission produces energy for [[nuclear power]] and to drive the explosion of [[nuclear weapon]]s. Both uses are made possible because certain substances
    31 KB (4,881 words) - 21:04, 13 December 2018
  • [[Image:Intcode.png|right|thumb|250px|1922 Chart of the Morse Code Letters and Numerals]] ... is transmitted using just two states (on and off) so it was an early form of a digital code. However, it is technically not [[binary numeral system|bina
    27 KB (4,127 words) - 23:26, 23 October 2018
  • ...h;that is, at frequencies lying below the visible and [[infrared]] regions of the [[electromagnetic spectrum]]. The term "radio" is also used for the equ ...t. In addition, it eliminates the need for extensive wiring between points of communication. This technology has been used for many practical application
    35 KB (5,194 words) - 10:07, 17 June 2019
  • ...nel]] whose narrow end touches the Earth and is often encircled by a cloud of [[debris]]. ...m/hallam.php Hallam Nebraska Tornado]. ''Omaha/Valley, NE Weather Forecast Office''. Retrieved August 19, 2007.</ref><ref name="SPC FAQ">Roger Edwards, 2
    69 KB (10,205 words) - 17:30, 11 December 2015
  • ...ology)|precipitation]], [[air traffic control]], [[police]] detection of [[speeding]] [[traffic]], and by the military. ...m]] for '''Ra'''dio '''D'''etection '''a'''nd '''R'''anging. This acronym of American origin replaced the previously used British abbreviation ''RDF'' (
    32 KB (4,880 words) - 10:03, 17 June 2019
  • ...reproduce the original digital [[data]]. Modems can be used over any means of transmitting analog signals, from driven [[diode]]s to [[radio]]. ...rial, or Network connection. Modems are generally classified by the amount of data they can send in a given time, normally measured in [[bits per second]
    43 KB (6,933 words) - 16:15, 11 October 2018
  • | image_caption = [[commons:Category:Canis lupus|other images of dogs]] ...he [[gray wolf]] ''(Canis lupus)'', a [[mammal]] of the [[Canidae]] family of the order [[Carnivora]].
    38 KB (6,076 words) - 15:50, 18 December 2014
  • *List of violinists '''This article is part of the [[Fiddle]] and Violin series.'''
    45 KB (7,305 words) - 22:42, 17 June 2019
  • '''Lightning''' is an atmospheric discharge of [[electricity]], which typically occurs during [[thunderstorm]]s, and somet ==History of research==
    51 KB (7,623 words) - 16:46, 6 July 2018
  • [[Image:Model Engine Luc Viatour.jpg|thumb|right|300px|School model of an engine.]] ...kinetic energy from a preprocessed "fuel" (such as [[electricity]], a flow of hydraulic fluid, or [[compressed air]]), it is called a [[motor]]. Thus, th
    16 KB (2,421 words) - 16:25, 6 September 2017
  • ...abs/astro-ph/0207347 The cosmological constant and dark energy,] ''Reviews of Modern Physics,'' 75: 559–606. Retrieved December 1, 2007.</ref> It is ca ...ons and quarks; (b) [[dark matter]], which outweighs regular matter but is of unknown composition; and (c) relic photons (the [[cosmic microwave backgrou
    26 KB (3,861 words) - 00:13, 14 November 2017
  • ...erm "Doppler [[radar]]" used for [[weather]] reports. Moreover, the impact of Doppler's work on [[astronomy]] has been enormous, particularly as the [[Do ..., he was allowed to follow an academic career. His father asked the advice of Simon Stampfer, a local educator, as to the boy's future. Stampfer recogniz
    11 KB (1,674 words) - 20:57, 18 February 2017

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