• We need your support!

    We are currently struggling to cover the operational costs of Xtremepapers, as a result we might have to shut this website down. Please donate if we have helped you and help make a difference in other students' lives!
    Click here to Donate Now (View Announcement)

Physics: Post your doubts here!

Silent Hunter

Silent Hunter

Messages
4,609
Reaction score
3,903
Points
323
queen of the legend said:
yesss question 5 cii
thank you :)
Click to expand...

searched alot for this question ;)

so what i think is that we do like this:

I/A^2 = I*/A*^2

take the star ones as the resultants

so we need to give in the form of I.

its like I/(3)^2 = I*/(1)^2

why 3? cuz the intensity I is the intensity of the wave a ? so A must be of wave a too ;) :)

in the end it comes out to be I* = 1/9 I

hope this helps....
 
queen of the legend

queen of the legend

Messages
169
Reaction score
117
Points
38
Silent Hunter said:
searched alot for this question ;)

so what i think is that we do like this:

I/A^2 = I*/A*^2

take the star ones as the resultants

so we need to give in the form of I.

its like I/(3)^2 = I*/(1)^2

why 3? cuz the intensity I is the intensity of the wave a ? so A must be of wave a too ;) :)

in the end it comes out to be I* = 1/9 I

hope this helps....
Click to expand...
thank you ! it did help
 
Kirabo Takirambudde

Kirabo Takirambudde

Messages
57
Reaction score
28
Points
18
raamish said:
N04: http://www.xtremepapers.com/papers/CIE/Cambridge International A and AS Level/Physics (9702)/9702_w04_ms_2.pdf
Qp: http://www.xtremepapers.com/papers/CIE/Cambridge International A and AS Level/Physics (9702)/9702_w04_qp_2.pdf

qs 3eii) Can anyone explain both the answers that are given in the mark scheme for this one please :)
Click to expand...

or:
The principle of conservation of momentum is only true if the system is closed and no external force acts on the system, here the force due to gravity (gravitational force) acts on the ball, hence the law is not true here
 
R

raamish

Messages
373
Reaction score
33
Points
28
Kirabo Takirambudde said:
or:
The principle of conservation of momentum is only true if the system is closed and no external force acts on the system, here the force due to gravity (gravitational force) acts on the ball, hence the law is not true here
Click to expand...

yeah i got it but can u explain the second occurence when the law doesnt apply cause i cant understand what it is trying to say?
 
G

geek101

Messages
399
Reaction score
234
Points
53
bamteck said:
http://www.xtremepapers.com/papers/CIE/Cambridge International A and AS Level/Physics (9702)/9702_w09_qp_22.pdf

HELP NEEDED for no. 3 (b) & 5(b) (c)(i)
Click to expand...

3b) ok here first you need to have a scale lets say : 1 ms-1 = 1 cm

and the vertical and horizontal velocities are perpendicular to each other
now draw 4.o cms >> v (horizontal)
6.2 cms >> v (vertical)
now complete the triangle and measure the length of the line >> the resultant velocity!
and measure the angle with the vertical

5b) phase difference = 360 ( x / lambda) where x is the distance between the points
now i cant figure out the 180 :p sorry

ci) speed = frequency x wavelength
wavelength = L and frequency = f
therefore speed = f . L
 
bamteck

bamteck

Messages
389
Reaction score
202
Points
53
geek101 said:
3b) ok here first you need to have a scale lets say : 1 ms-1 = 1 cm

and the vertical and horizontal velocities are perpendicular to each other
now draw 4.o cms >> v (horizontal)
6.2 cms >> v (vertical)
now complete the triangle and measure the length of the line >> the resultant velocity!
and measure the angle with the vertical

5b) phase difference = 360 ( x / lambda) where x is the distance between the points
now i cant figure out the 180 :p sorry

ci) speed = frequency x wavelength
wavelength = L and frequency = f
therefore speed = f . L
Click to expand...

Thanks a lot !
 
You must log in or register to reply here.
Top