Twins A and B live on Earth. On their 20th birthday, twin B climbs into a spaceship

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Twins A and B live on Earth. On their 20th birthday, twin B climbs into a spaceship and makes a round-trip journey at 0.95c to a star 30 light years distant, as measured in the Earth–star reference frame. What are their ages when twin B returns to Earth?

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Related Book For  answer-question

Essential University Physics

ISBN: 978-0321976420

3rd Edition Volume 2

Authors: Richard Wolfsonby

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