advancing wave
81Vietnam — /vee et nahm , nam , vyet , vee it /, n. 1. Official name, Socialist Republic of Vietnam. a country in SE Asia, comprising the former states of Annam, Tonkin, and Cochin China: formerly part of French Indochina; divided into North Vietnam and… …
82Dungeon Defenders — Xbox Live Arcade Cover Art Developer(s) Trendy Entertainment Publisher(s) Reverb Communications …
83Doppler effect — Change of wavelength caused by motion of the source. An animation illustrating how the Doppler effect causes a car engine or siren to soun …
84Quantum mechanics — For a generally accessible and less technical introduction to the topic, see Introduction to quantum mechanics. Quantum mechanics …
85Guadalcanal Campaign — Part of the Pacific Theater of World War II …
86Invasion of Poland (1939) — Infobox Military Conflict partof=World War II caption=German battleship Schleswig Holstein , shelling Westerplatte, 1 September 1939. date=1 September – 6 October 1939 place=Poland result=Decisive Axis and Soviet victory; Polish territory split… …
87Donald Howard Menzel — by Babette Whipple Born April 11, 1901 …
88Westmount Secondary School — Infobox Education in Canada name= Westmount Secondary School motto= Laboris Dulcedo streetaddress= 39 Montcalm Drive city= Hamilton province= Ontario postalcode= L9C 4B1 areacode= 905 phone= 385 5395 fax= 574 6020 url=… …
89Siege of Budapest — Infobox Military Conflict conflict=Siege of Budapest caption=A Soviet soldier writing Budapest in Russian on a signpost after the siege. partof=the Eastern Front, Budapest Offensive of World War II place=Budapest, Hungary|date=29 December, 1944… …
90Invention of radio — Great Radio Controversy redirects here. For the album by the band Tesla, see The Great Radio Controversy. Contents 1 Physics of wireless signalling 2 Theory of electromagnetism …
