問題詳情
10. A spaceship approaches the earth with a speed 0.50c. A passenger in the spaceship measures his heartbeat as 70
beats per minute. What is his heartbeat rate (beats per minute) according to an observer that is at rest relative to
the earth?
(A) 69,
(B) 73,
(C)80,
(D) 65,
(E) 61.
參考答案
答案：E
統計：A:0,B:0,C:0,D:0,E:0
難度：計算中