The size of a vibration iscalled its amplitude (振幅), so the louder the sound is, the biggerthe amplitude is.Sound waves travel at a speed of 330 metres per secondthrough air at 0℃. This speed increases(增加) if the airtemperature goes up, and decreases(减少) if the temperaturegoes ...
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a中国良渚文化博物馆 正在翻译,请等待... [translate] aFor the train speed factor, the vibration level increases with increasing train speed, but the incremental rate is more obvious on soft ground. 为火车速度因素,振动水平增量随着火车速度的增加,但增加率是显然在软的地面。 [translate] ...
asummarize the Victorian Britain's circumstances 总结维多利亚女王时代的英国的情况 [translate] aspeed, causing high 1 vibration that often exceeded 4.0 mils peak-to-peak at the vibration probes 速度,导致上流经常超出4.0米尔尖峰对尖峰在振动的1振动探查 [translate] ...
Sound must travel through matter, because it needs the vibration of molecules to travel. The matter that transports the sound is called the medium. Speed of sound The speed of sound is how fast the wave or vibrations pass through the medium or...
This is known as “virtual coupling” and involves the two trains communicating information about their changing speed and brake activity so that they can decrease or increase the gap between them to the minimum necessary. With shorter gaps between them, more trains could run safely on a route,...
New York City is home to a million pigeons, which support large populations of raptors. But pigeons’ aptitude for swift flight, further exploited by being bred for racing, means they’re made for high-speed chases. Compared to barn owls, which are a similar size, pigeon wing bones are ...
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