without explainations,
everyone...
won't believe you,
and say I'm crazy...
-3: 00 PM-
30November2006
I always have a problem to think of...I don't know which to be my ambition...
sigh...i always wanted to be an artist... But I am really scared of Death... so I wanted to be one who test the medicine to fight some germs and make new medicine,because i wanted to make a medicine for long life... So I don't know what to do now, anyone can give me any comments?You can put your comments in the taging place.=(... Plz help )= THX!!
Friday, August 12, 2005
-5:01 AM-
16April2006
Do you wander why when we hit things with our hand or legs,we will felt pain in them?
I had learnt this year about force.When force is exerted on somethings,the kinetic force will be passed on to the object you hit.But because our hands and legs have sense,so we will feel the pain.
For example,when our hands punches the floor or the wall,we will feel pain,why is this so?It is because that when the kinetic energy of our hands punches the floor or the wall,the kinetic energy of our hands is passed on to the wall or the floors,as they doesn't move,the force is passes back to us.When it is passed back to us which we tried to overcome the force,the friction of the force that we passed onto the wall or the floor is much stronger than the one we tried to overcome is which makes our hand feel the pain..