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51Radar — For other uses, see Radar (disambiguation). A long range radar antenna, known as ALTAIR, used to detect and track space objects in conjunction with ABM testing at the Ronald Reagan Test Site on Kwajalein Atoll …
52List of Statutory Instruments of the United Kingdom, 1987 — This is a complete list of all 1468 Statutory Instruments published in the United Kingdom in the year 1987. NOTOC 1 100* Parish and Community Meetings (Polls) Rules 1987 S.I. 1987/1 * National Health Service (Food Premises) (Scotland) Regulations …
53Africa — /af ri keuh/, n. 1. a continent S of Europe and between the Atlantic and Indian oceans. 551,000,000; ab. 11,700,000 sq. mi. (30,303,000 sq. km). adj. 2. African. * * * I Second largest continent on Earth. It is bounded by the Mediterranean Sea,… …
54Earth Sciences — ▪ 2009 Introduction Geology and Geochemistry The theme of the 33rd International Geological Congress, which was held in Norway in August 2008, was “Earth System Science: Foundation for Sustainable Development.” It was attended by nearly… …
55Franklin's lost expedition — legend|blue|Disko Bay (5) to Beechey Island, in 1845.legend|purple|Around Cornwallis Island (1), in 1845.legend|red|Beechey Island down Peel Sound between Prince of Wales Island (2) and Somerset Island (3) and the Boothia Peninsula (4) to near… …
56Migración de las aves — La migración de las aves se refiere a los viajes estacionales regulares realizados por muchas especies de aves. Además de la migración, las aves realizan otros movimientos en respuesta a cambios en la disponibilidad de alimentos, de hábitat o… …
57Iraq — /i rak , i rahk /, n. a republic in SW Asia, N of Saudi Arabia and W of Iran, centering in the Tigris Euphrates basin of Mesopotamia. 22,219,289; 172,000 sq. mi. (445,480 sq. km). Cap.: Baghdad. Also, Irak. * * * Iraq Introduction Iraq Background …
58telecommunications media — Introduction equipment and systems metal wire, terrestrial and satellite radio, and optical fibre employed in the transmission of electromagnetic signals. Transmission media and the problem of signal degradation Every… …
59UNITED STATES OF AMERICA — UNITED STATES OF AMERICA, country in N. America. This article is arranged according to the following outline: introduction Colonial Era, 1654–1776 Early National Period, 1776–1820 German Jewish Period, 1820–1880 East European Jewish Period,… …
60Global Positioning System — GPS redirects here. For other uses, see GPS (disambiguation). Geodesy Fundamentals …
