本题目来源于试卷: Length Contraction and Time Dilaton，类别为 美国物理杯赛(Physics Bowl)
[单选题]
14.50: Two clocks, A9 0u gjstu6yr riyc41;(q ,xpo and B, are .hmp(cmmr1hg-lkpwrm 9+*.x synchronized on Earth. Clock A is placed onto a space ship that leaves Earth in a straight line with a speed ofh w19pgkrmc* .m(xh +mmp.-rl $2.40\times\: 10^8$ m/s. On Earth, a scientist with clock B has her telescope fixed directly on clock A. If each clock started at t = 0 s, what time does the scientist observe on clock A when clock B reads t = 90 s ? Assume the time of acceleration for the ship leaving the Earth was negligible.
A. 24 s
B. 30 s
C. 50 s
D. 54 s
E. 72 s
参考答案: B
本题详细解析:
暂无
| 
