person puts in a 9.1 hr shift while travelling on a spaceship. An observer on Earth determines that the time spent was actually 11.8 hr. At what percent of the speed of light was the spaceship mo
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A person puts in a 9.1 hr shift while travelling on a spaceship. An observer on Earth determines that the time spent was actually 11.8 hr. At what percent of the speed of light was the spaceship moving?
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