Social Studies, 09.07.2021 17:30 lala1794
A set of twins, Andrea and Courtney, are initially 10 years old. While Courtney remains on Earth, Andrea rides on a space ship which travels away from Earth at a speed of 0.6c for five years (as measured by Courtney), then turns around and comes back at 0.6c. When Andrea returns, Courtney is 20 years old. How old is Andrea upon her return
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A set of twins, Andrea and Courtney, are initially 10 years old. While Courtney remains on Earth, An...
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