Word: zero
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Dates: during 1950-1959
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...shock wave rushes out like a solid steel wall. At some points it is joined by a reflected wave. The two combine to apply redoubled pressure (called the "Mach front"). Behind the shock wave comes a great wind, at a speed of 800 m.p.h. A mile from "ground zero" (the point directly under the burst), the speed of the wind drops to 200 m.p.h.; 1½ miles away, to 100 m.p.h. Behind the wind comes a partial vacuum, which acts like another wind coming from the opposite direction. Three miles away, the shock wave, wind and vacuum begin to peter...
...bomb exploded 2,000 feet above the ground would do the greatest damage. Virtually everything within a radius of half a mile by ground zero will be destroyed or irreparably damaged by the blast, the heat, or by fires started by the heat. Within the next mile, countless fires will be started by the heat radiation. As many fires will be started by broken gas lines, electrical short circuits. Broken water lines will make fire-fighting almost impossible...
...group of students takes nothing but English. Then, after a four-day holiday, the group may begin nine weeks of mathematics, then a language, then history or science. Students and teachers both seem to like the new schedule. Dismissals for scholastic failure have dropped from 15 a year to zero and there is no sign at all that students are bored by their nine-week stretches. "You'd be surprised," says Clark. "For most of them it is the first time they have a chance to get really interested in a subject...
...Whole Business. Until 20 years ago, a woman going through the climacteric suffered these symptoms as best she could. Today synthetic hormone shots or hormone pills can reduce the discomfort to a point close to zero. Author Lincoln is careful to point out that most women don't need synthetic hormone treatments. The hormones, she writes, may be dangerous and sometimes produce unpleasant "side effects" such as "sore full breasts . . . dull aching or a kind of premenstrual congestion in the lower abdomen...
...Zero Votes. The House, which only six months ago had voted down U.S. aid to Korea (and then sheepishly reversed itself) got busy too. It cut short debate on extending the peacetime draft, a red-hot issue suddenly cooled by the winds of necessity, and approved it 315 to 4. The Senate sent it along next day, 76 to 0. The President was thus assured of another year's power to draft 19-to 26-year-olds, and new power to call up the National Guard and the reserves in an emergency...