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Home Q & A Board Science-Related Homework Help Physics
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GollumOfOz GollumOfOz
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7 years ago
A set of twins, Andrea and Courtney, are initially 10 years old.  While Courtney remains on Earth, Andrea rides on a spaceship which travels away from Earth at a speed of 0.60c for five years (as measured by Courtney), then immediately turns around and comes back at 0.60c.  When Andrea returns, Courtney is 20 years old.  How old is Andrea upon her return?
A) 10 y
B) 12 y
C) 15 y
D) 18 y
E) 20 y
Textbook 
Principles & Practice of Physics

Principles & Practice of Physics


Edition: 1st
Author:
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rubenphobiarubenphobia
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7 years ago Edited: A year ago, bio_man
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GollumOfOz Author
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7 years ago
Helpful
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4 years ago
a
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4 years ago
Thank you!
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