mamasing

I agree, I heard that astronaut cannot pee or shit while they are in space.
+ Y, {! X( D) v$ EIt must be a painful joruney.
  l9 n! n) q0 T3 j( p公仔箱論壇Oh BTW, if your lecturer talks about "地心引力" in your Physics class.
, v" V! l2 F( W- @$ P0 |tvb now,tvbnow,bttvbI suggest you pack and pick other subject instead, if you really like Physics,
$ ?# v3 B4 `# V1 Y0 o3 Wyou need to switch school.
, c% G: V, o" }# U  lThere is no 地心引力, but "gravitational" force only.
9 C% d" F& A7 w4 A2 M1 v$ N( D: @5 hA simple meaning of Gravitational force = the force of attraction between any tvb now,tvbnow,bttvb% ]- ^! {! T3 @7 w; U  ^  f' b
two masses.
  g, {( v9 A* F4 h' a4 i% fwww1.tvboxnow.com; D# x! [* o! c3 ]2 Y- e0 C
Gosh, I got fooled by my HK Physics teacher many years ago.