A spacecraft with a proper length of 350 m passes by an observer on the Earth....

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Physics

A spacecraft with a proper length of 350 m passes by an observeron the Earth. According to this observer, it takes 0.780 µs for thespacecraft to pass a fixed point. Determine the speed of thespacecraft as measured by the Earth-based observer.

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lengthl350 m time0780 s Wew know that the apparent length speed x time 078106s We can assume that the speed is close to the speed of light So we can make an approximation as The apparent    See Answer
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