本题目来源于试卷: Physics Unit26: Special Theory of Relativity,类别为 Generic Physics
[单选题]
A set of twins, Andrea and Courtney, are initially 10 years old. Whilee( puki:zj8zz zw a532 Co4 wd7 cjy/c bgea6f,9vurtney remains on Earth, Andrea rides on a space ship which travels away from Earth at a speed of 0.6c for gb,e6j 4avw7y cdf/c9 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?
A. $10 \; years$
B. $12 \; years$
C. $18 \; years$
D. $20 \; years$
参考答案: C
本题详细解析:
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