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Physics: Post your doubts here!

Silent Hunter

Silent Hunter

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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

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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

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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

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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?
 
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