reflected+sound
111History of film — This article is about the history of cinema. For other uses, see History of photography. Years in film 1870s 1880s 1890s …
112Romance languages — Romance Geographic distribution: Originally Southern Europe and parts of Africa; now also Latin America, Canada, parts of Lebanon and much of Western Africa Linguistic classification: Indo European Italic …
113Medical ultrasonography — This article is about using ultrasound to image the human body. For imaging of animals in research, see Preclinical imaging. Sonography redirects here. For the tactile alphabet called sonography , see Night writing. Medical ultrasonography… …
114The Doobie Brothers — Doobie Brothers in Berkeley, California, September 11, 1982. L to R: : Michael Hossack, Patrick Simmons, John Hartman, Tom Johnston. Background information Origin San Jose …
115music, Western — Introduction history of Western music from ancient times to the present. All ancient civilizations entered historical times with a flourishing musical culture. That the earliest writers explained it in terms of legend and myth is… …
116Acoustic transmission lines — An acoustic transmission line is the acoustic analog of the electrical transmission line, typically thought of as a rigid walled tube that is long and thin relative to the wavelength of sound present in it. Pipe organs, woodwinds, and the like… …
117education — /ej oo kay sheuhn/, n. 1. the act or process of imparting or acquiring general knowledge, developing the powers of reasoning and judgment, and generally of preparing oneself or others intellectually for mature life. 2. the act or process of… …
118international relations — a branch of political science dealing with the relations between nations. [1970 75] * * * Study of the relations of states with each other and with international organizations and certain subnational entities (e.g., bureaucracies and political… …
119Rocket engine — RS 68 being tested at NASA s Stennis Space Center. The nearly transparent exhaust is due to this engine s exhaust being mostly superheated steam (water vapor from its propellants, hydrogen and oxygen) …
120Christianity — /kris chee an i tee/, n., pl. Christianities. 1. the Christian religion, including the Catholic, Protestant, and Eastern Orthodox churches. 2. Christian beliefs or practices; Christian quality or character: Christianity mixed with pagan elements; …
