mamasing

I agree, I heard that astronaut cannot pee or shit while they are in space.% Q$ G, _9 q' F9 w' A) S
It must be a painful joruney.
1 I, q: u5 a% f" w0 aOh BTW, if your lecturer talks about "地心引力" in your Physics class.5.39.217.77:8898# s7 w7 @6 C9 V! m
I suggest you pack and pick other subject instead, if you really like Physics,
' ?4 v& q+ [: o1 DTVBNOW 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。you need to switch school.公仔箱論壇) \# \2 y' \) N  q0 S" o
There is no 地心引力, but "gravitational" force only.8 V  Q/ m! s; X# l% i
A simple meaning of Gravitational force = the force of attraction between any
" ~  p; i" ?3 U* k& e. D, f8 htwo masses.+ q- V* n+ n% ?/ y3 r

! H! j5 c% e% [' Z6 FGosh, I got fooled by my HK Physics teacher many years ago.