又算錯,周期T約=85分.
所有跟帖:
•
84
-guest007-
♂
(148 bytes)
()
09/15/2011 postreply
09:56:00
•
Thx, my earth radius is too long ,if it is 6370km,the answer is
-jinjing-
♀
(59 bytes)
()
09/15/2011 postreply
10:16:25
•
6370/6400*85=84
-jinjing-
♀
(0 bytes)
()
09/15/2011 postreply
10:17:40