ALL PHYSICS DOUBTS - POST HERE !!

[Shazizzzle]

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??

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]

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.

Thanks A million 

[Girlie45]

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.

Thanx! By the way liking the stewie pic  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]

Thanx! By the way liking the stewie pic  hahaha

STEWIE GRIFFIN FTW!!!!

[Ghost Of Highbury]

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??  

Should be C. Incorrect MS?

[haris94]

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??  

i think its C
the gap is wide

[Dana]

Should be C. Incorrect MS?

I dno :/ how can I tell?

[8T]

u should get 6.4*10^5 with converting to m3 and without converting
ms must be wrong

So can u do the conversion and show me please because i keep getting 6.4 ??
In both with and without???
Thanks

[Ivo]

Should be C. Incorrect MS?

I agree.  The gap is wider than the wavelength, so yeah totally agree it's C.  It's not the proper mark scheme anyway.

[Dana]

I agree.  The gap is wider than the wavelength, so yeah totally agree it's C.  It's not the proper mark scheme anyway.

Okay thanks 
but wait if the gap wasn't wider than the wavelength, it'd be D?  :S

[Ghost Of Highbury]

Okay thanks 
but wait if the gap wasn't wider than the wavelength, it'd be D?  :S

D, yes.

[Dana]

D, yes.

Learn a new thing everyday, thanks!
Do you think the exam's gonna be tough? Cuz chem yesterday was super easy

[Ghost Of Highbury]

Learn a new thing everyday, thanks!
Do you think the exam's gonna be tough? Cuz chem yesterday was super easy

No Clue. CIE is evil.

[Ivo]

Learn a new thing everyday, thanks!
Do you think the exam's gonna be tough? Cuz chem yesterday was super easy

I'll say, Phy P1 will be harder than Chem P1, but then P3 would be easier than Bio!