問題詳情
56. A spaceship S1 is moving away from us at a speed of 0.8 c. Another spaceship S2 is moving awayfrom us in the opposite direction at a speed of 0.5 c. What is the speed of S1 measured by anobserver on S2?
(A) 1.3 c
(B) 1.0 c
(C) 0.97 c
(D) 0.93 c
(E) 0.89 c
參考答案
答案：D
難度：計算中-1
書單：沒有書單，新增
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