mamasing

I agree, I heard that astronaut cannot pee or shit while they are in space.
4 b' |7 t8 [  t7 ^tvb now,tvbnow,bttvbIt must be a painful joruney.
( r! z8 V; w" T6 F5.39.217.76Oh BTW, if your lecturer talks about "地心引力" in your Physics class.
, w) D+ {9 J! O! @I suggest you pack and pick other subject instead, if you really like Physics, 公仔箱論壇% `9 f( Z  o! F# H1 [7 W# m
you need to switch school.
1 ?! {1 _! v2 E, `) a5.39.217.76There is no 地心引力, but "gravitational" force only.
/ z( s) B' n' D" f: a/ K* N5.39.217.76A simple meaning of Gravitational force = the force of attraction between any 公仔箱論壇* z* \. i( M4 X1 k
two masses.
& _( z4 _. C3 H3 [( Mtvb now,tvbnow,bttvb9 F& J$ x& b" y$ @1 r3 S
Gosh, I got fooled by my HK Physics teacher many years ago.