Word: meters
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Dates: during 1980-1989
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Annie Wilson, Jessica Hall and Debbie Zimic scored in double figures and Shannon Byrd set a pool record in the three-meter dive to lead the Harvard women's swimming team past B.C., 82-58 last night at Chestnut Hill...
...1790s, revolutionary France tried to bring order to the existing hodgepodge of weights and measures by adopting the metric system. Its scientists confidently set the meter as 1/10,000,000 of the distance between the North Pole and the equator. Making that measurement, however, turned out to be impossibly difficult not only because the earth is far from a perfect, unchanging sphere but because of France's internal turmoil. The government's surveyors were arrested as royalist spies, narrowly escaping the guillotine...
...scientists had defined the meter as the distance between two marks on a platinum-iridium bar kept under controlled conditions near Paris. Still, even this measurement, accurate to one part in a million, was eventually adjudged unsatisfactory. In 1960 the meter was redefined as 1,650,763.73 wave lengths of the reddish-orange light emitted by krypton 86, a rare atmospheric...
Although the krypton meter was accurate to four parts per billion, it led to errors of up to 5 ft. in such experiments as measuring the distance from the earth to the moon-an irritant to scientists exploring the nuances of relativity or movements of continents. Now, by redefining the meter in terms of time, the scientists are using the most accurately known base measure. With its incredibly precise atomic clocks, the Bureau of Standards can measure the second to better than one part in 10 trillion. The new standard, to be sure, makes no significant difference for workaday tasks...
...Even the nonmetric U.S. has legally established the yard as exactly .91440183 meter...