mamasing

I agree, I heard that astronaut cannot pee or shit while they are in space.5 y. I4 O( c; F# g1 a4 u
It must be a painful joruney.
1 @4 w* y# ?1 D. t( R+ k' Stvb now,tvbnow,bttvbOh BTW, if your lecturer talks about "地心引力" in your Physics class.公仔箱論壇1 |1 Q/ \4 j; ]4 N+ W
I suggest you pack and pick other subject instead, if you really like Physics, TVBNOW 含有熱門話題，最新最快電視，軟體，遊戲，電影，動漫及日常生活及興趣交流等資訊。$ S% `! }' v1 w7 v1 s* e1 N
you need to switch school.os.tvboxnow.com3 o( f3 b8 s7 J  E
There is no 地心引力, but "gravitational" force only.
$ x5 v. S4 J2 K. C, o' Q7 D' [tvb now,tvbnow,bttvbA simple meaning of Gravitational force = the force of attraction between any
% o2 {7 w8 f# R$ ?2 {) ltwo masses.- N& J4 r6 r7 x* o6 w6 K* j

, k) j7 P' Y2 @" V% F9 uGosh, I got fooled by my HK Physics teacher many years ago.