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Title: Time is now precisely measured with primary standard clocks that are based on Post by: kendreae on Mar 29, 2017 Time is now precisely measured with primary standard clocks that are based on
A) very precise pendulum motion. B) the first appearance of ground hogs on Ground Hog day. C) the vibration of cesium atoms. D) the pulse rate of pulsar stars. Title: Re: Time is now precisely measured with primary standard clocks that are based on Post by: kivlihan on Mar 29, 2017 Content hidden
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