本题目来源于试卷: Physics Unit26: Special Theory of Relativity，类别为 通用国际物理
[单选题]
A set of twins, Andrbq*g;ewqc gsw;7 ,l*xtw,9qo4(pe im ea and Courtney, are initially 10 years old. While Courtney remains on Earth, Andrea rides on a space ship which travels away from Earth mqtwi49e, o p(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?
A. $10 \; years$
B. $12 \; years$
C. $18 \; years$
D. $20 \; years$
参考答案: C
本题详细解析:
暂无
| 
