Qualification > Sciences
ALL PHYSICS DOUBTS - POST HERE !!
Shazizzzle:
--- Quote from: SoONa on May 26, 2010, 09:39:34 am ---A force acts on a moving rubber ball.
How many of the following changes could happen to the ball because of the force?
• a change in direction
• a change in shape
• a change in mass
• a change in speed
A 1 B 2 C 3 D 4
the answer is C which is 3 but i didnt understand why??
--- End quote ---
3, because, A force CAN change the direction, shape, and speed, BUT a force CANNOT change the mass of an object.
Recall forces.
So...
Only 3/4 are correct, thus C.
SoONa:
--- Quote from: Shazizzzle on May 26, 2010, 09:43:02 am ---3, because, A force CAN change the direction, shape, and speed, BUT a force CANNOT change the mass of an object.
Recall forces.
So...
Only 3/4 are correct, thus C.
--- End quote ---
Thanks A million ;D
Girlie45:
--- Quote from: A@di on May 26, 2010, 09:36:51 am ---a neutron spilts into a proton and an electron, the electron is emitted.
so no. of neutrons decreases by 1, and no. of protons increases by 1.
--- End quote ---
Thanx! By the way liking the stewie pic ;D hahaha
Dana:
In Nov 93 number 19
http://www.freeexampapers.us/IGCSE/Physics/CIE/1993%20Nov/0625_w93_qp_01.pdf
It says which diagram shows the diffraction of a wave going through a wide gap.
Isn't it C? The one that shows the waves slightly bent at the ends, and not D as the mark scheme says, which shows perfectly curved waves?? ???
Ghost Of Highbury:
--- Quote from: Girlie45 on May 26, 2010, 09:46:45 am ---Thanx! By the way liking the stewie pic ;D hahaha
--- End quote ---
STEWIE GRIFFIN FTW!!!!
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