Twins A and B live on Earth. On their 20th birthday, twin B climbs into a spaceship and
Chapter 33, Problem 33(choose chapter or problem)
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 Earthstar reference frame. What are their ages when twin B returns to Earth?
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