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词汇 watt
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watt. There is probably no truth in the charming old tale that James Watt watched his mother’s teakettle boiling as a child, and later invented the steam engine as a result. Watt, born in Scot- land of poor parents, did, however, get off to an early start in his scientific endeavors. In 1765 the inquisitive Scotsman launched into a study of steam when a model of Thomas Neucomen’s steam engine was brought to him to repair. He soon invented the first economical steam engine, which was initially used only for pumps in mines but eventually brought steam power to in- dustry on a large scale. Watt devoted his life to perfecting and producing his new engine, manufacturing it with Matthew Boulton of Birmingham. He died in 1819, aged 83. Toward the end of the century the International Electrical Congress named the watt, the unit of electrical power—736 watts equal to about one horsepower—in the inventor’s honor. His name is also re- membered by the kilowatt, one thousand watts; the kilowatt hour, a measurement by which electricity is sold; the watt-hour meter, which measures kilowatts; the watt-meter, an instrument for measuring a power load; and the watt-second, a unit of work. Wattage is power measured in watts, and “wattless” is an electri- cal term meaning without watts or power.
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更新时间:2024/11/11 5:39:41