concrete block gravity wall
41earthquake — /errth kwayk /, n. 1. a series of vibrations induced in the earth s crust by the abrupt rupture and rebound of rocks in which elastic strain has been slowly accumulating. 2. something that is severely disruptive; upheaval. [1300 50; ME erthequake …
42MythBusters (2010 season) — Country of origin Australia United States No. of episodes 25 (includes 4 specials) Broadcast Original channel …
43arts, East Asian — Introduction music and visual and performing arts of China, Korea, and Japan. The literatures of these countries are covered in the articles Chinese literature, Korean literature, and Japanese literature. Some studies of East Asia… …
44Mathematics and Physical Sciences — ▪ 2003 Introduction Mathematics Mathematics in 2002 was marked by two discoveries in number theory. The first may have practical implications; the second satisfied a 150 year old curiosity. Computer scientist Manindra Agrawal of the… …
45Trump International Hotel and Tower (Chicago) — Infobox Skyscraper building name=Trump International Hotel and Tower caption=Trump International Hotel and Tower (Chicago) on the day its topping out ceremony September 24, 2008 caption2=Location of Trump Tower Chicago antenna… …
46Panama Canal Locks — The Panama Canal Locks, which lift ships up 25.9 m (85 ft) to the main elevation of the Panama Canal, were one of the greatest engineering works ever to be undertaken at the time, eclipsed only by other parts of the canal project. No other… …
47Monadnock Building — U.S. National Register of Historic Places U.S. National Historic Landmark District Contributing Property …
48World Trade Center — For other uses, see World Trade Center (disambiguation). World Trade Center[1] …
49List of MythBusters episodes — This is the episode list of the popular science television series MythBusters which airs on Discovery Channel. There is no consistent system for organizing MythBusters episodes into seasons. The show does not follow a typical calendar of on and… …
50military technology — Introduction range of weapons, equipment, structures, and vehicles used specifically for the purpose of fighting. It includes the knowledge required to construct such technology, to employ it in combat, and to repair and replenish it.… …
