mamasing

I agree, I heard that astronaut cannot pee or shit while they are in space.
! w* e& Y. j1 w/ Q$ I' I/ [2 BIt must be a painful joruney.
5 \* P  ~# V0 P* D5.39.217.77:8898Oh BTW, if your lecturer talks about "地心引力" in your Physics class.) U% L! I* _' H
I suggest you pack and pick other subject instead, if you really like Physics, $ x: _+ A0 F! H) T- l8 Q- W
you need to switch school.5.39.217.77:8898( F. f0 p- C$ }
There is no 地心引力, but "gravitational" force only.
9 H6 A) E" d' W: {) tA simple meaning of Gravitational force = the force of attraction between any tvb now,tvbnow,bttvb- Z6 u" D& d/ ~2 P' q, B
two masses.1 x3 g/ H8 Q1 L/ e" o

, R  Y6 ~6 u$ g4 M5 _: dGosh, I got fooled by my HK Physics teacher many years ago.