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121Space elevator safety — There are many safety issues associated with the construction and operation of a space elevator. A space elevator would present a considerable navigational hazard, both to aircraft and spacecraft. Aircraft could be dealt with by means of simple… …
122wood — wood1 woodless, adj. /wood/, n. 1. the hard, fibrous substance composing most of the stem and branches of a tree or shrub, and lying beneath the bark; the xylem. 2. the trunks or main stems of trees as suitable for architectural and other… …
123Wood — /wood/, n. 1. Grant, 1892 1942, U.S. painter. 2. Leonard, 1860 1927, U.S. military doctor and political administrator. * * * I Hard, fibrous material formed by the accumulation of secondary xylem produced by the vascular cambium. It is the… …
124materials testing — Introduction measurement of the characteristics and behaviour of such substances as metals, ceramics, or plastics under various conditions. The data thus obtained can be used in specifying the suitability of materials for various… …
125roads and highways — ▪ transportation Introduction traveled way on which people, animals, or wheeled vehicles move. In modern usage the term road describes a rural, lesser traveled way, while the word street denotes an urban roadway. Highway refers to a major… …
126work, history of the organization of — Introduction history of the methods by which society structures the activities and labour necessary to its survival. work is essential in providing the basic physical needs of food, clothing, and shelter. But work involves more than the use …
127Damage to Baghdad during the Iraq War — The city of Baghdad suffered significant damage during the Iraq War. The population of Baghdad is around 7 million people.[1] In October 2003, a joint United Nations/World Bank team conducted an assessment of funding needs for reconstruction in… …
128Martin Luther King, Jr. Memorial — This article is about the memorial in Washington, D.C.. For the national historic site in Atlanta, Georgia, see Martin Luther King, Jr., National Historic Site. Martin Luther King, Jr. Memorial U.S. National Memorial …
