mamasing

I agree, I heard that astronaut cannot pee or shit while they are in space.
: b  A1 D: i: V; K8 o公仔箱論壇It must be a painful joruney.
8 j% L" Z& v0 E2 G7 W$ Z2 Y2 c5.39.217.76Oh BTW, if your lecturer talks about "地心引力" in your Physics class.+ m: E" D* J( @6 J4 \' j8 F
I suggest you pack and pick other subject instead, if you really like Physics, 公仔箱論壇- Z" Q4 x& V- J' t8 L) r5 |8 k
you need to switch school.
& |! m5 V, E6 b! Q- @1 btvb now,tvbnow,bttvbThere is no 地心引力, but "gravitational" force only.
3 c/ g3 Q& m8 q. G7 y- x5 |% t8 |5.39.217.76A simple meaning of Gravitational force = the force of attraction between any tvb now,tvbnow,bttvb/ u" E3 N7 V  @; s
two masses.# ~$ C3 p4 q' m+ n
5.39.217.760 P8 |( U8 j- i
Gosh, I got fooled by my HK Physics teacher many years ago.