mamasing

I agree, I heard that astronaut cannot pee or shit while they are in space.
: O, b7 j9 t( zIt must be a painful joruney.
  {+ s& K+ H3 q, q5 I% O公仔箱論壇Oh BTW, if your lecturer talks about "地心引力" in your Physics class.
; G; Q5 S9 j- K1 u$ ~) K# u; |) utvb now,tvbnow,bttvbI suggest you pack and pick other subject instead, if you really like Physics,
2 t: B0 u3 ?" _' Hyou need to switch school.5.39.217.76& q+ v+ P  X5 B# \4 Y
There is no 地心引力, but "gravitational" force only., K2 j- N! Q# B% [- V. g1 E  u
A simple meaning of Gravitational force = the force of attraction between any . I5 u5 [; |9 E7 |3 ]
two masses.5.39.217.76' Z: ]0 y% W+ M
tvb now,tvbnow,bttvb7 `* l/ @% v- R4 `
Gosh, I got fooled by my HK Physics teacher many years ago.