Short Answer
A spaceship visits a star that is 4.5 light-years from Earth, and the spaceship travels at one-half the speed of light for the entire trip.
(a) How long did the trip take according to an observer on Earth?
(b) How long did the trip take according to an observer on the spaceship?
Correct Answer:
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(a) 9.0 li...View Answer
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Correct Answer:
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