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[10] [86] The sheer quantity of such donations caused logistical and inventory control problems until drop-off centers were set up to accept and sort the goods. [78] The Oklahoma Restaurant Association, which was holding a trade show in the city, assisted rescue workers by providing 15,000 to 20,000 meals over ten days.
1851: George Jennings offers the first public flush toilets, accessible for a penny per visit, and in 1852 receives a UK patent for the single piece, free standing, earthenware, trap plumed, flushing, water-closet. [426] 1852: Robert Bunsen is the first to use a chemical vapor deposition technique. 1852: Elisha Otis invents the safety brake ...
The Munroe or Neumann effect is the focusing of blast energy by a hollow or void cut on a surface of an explosive. The earliest mention of hollow charges were mentioned in 1792. Franz Xaver von Baader (1765–1841) was a German mining engineer at that time; in a mining journal, he advocated a conical space at the forward end of a blasting ...
Researchers in Arizona say they have discovered the oldest gun in the U.S., a cannon used during the first European expedition across the Southwest.
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Larger bombs with less streamlined shapes also remained in the Soviet arsenal, primarily for use by heavy bombers. In the Iran–Iraq War , FAB-5000 (11,000 lb or 5,000 kg) and FAB-9000 (20,000 lb or 9,000 kg) bombs were dropped by Iraqi Air Force Tupolev Tu-22 bombers, generally against large, fixed targets in Iran. [ 11 ]
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According to UNESCO, a preschool curriculum is one that delivers educational content through daily activities and furthers a child's physical, cognitive, and social development. Generally, preschool curricula are only recognized by governments if they are based on academic research and reviewed by peers.
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