Physics: Post your doubts here!

[manya]

No Kinetic energy is lost in a perfectly elastic collision

Therefore Speed of approach = Speed of projection

Momentum AND total energy is ALWAYS conserved

oh thankyou so much. i guess i didnt read the elastic collision part carefully

 

[princess Anu]

Can somebody explain why d and not c? please

 

[Mahnoorfatima]

Just a general thing: Are giving Mocks necessary. What if we don't give mocks?

 

[The Godfather]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_w11_qp_11.pdf
In q 24 why is A wrong???
And I DONT get question 28!

24: By knowing area under Force - extension graph is the energy stored in the material answer is B.
28: YEt not done in my course. Sorry.

 

[The Godfather]

Can somebody explain why d and not c? pleaseView attachment 51356

Q481 : http://physics-ref.blogspot.in/2015/03/physics-9702-doubts-help-page-93.html

 

[princess Anu]

Is it true that for a projectile not travelling in air, the angle of launch is equal to the angle of strike?

 

[Mahnoorfatima]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_s11_qp_13.pdf
Question 10,15,19 PLEASE!

 

[Mahnoorfatima]

And whenever the resultant torque is 0 the resultant force has to be 0 whatsoever?

 

[Talha Jameel]

Besides the formula sinI/sinR, what actually is 'refractive index' ?

 

[princess Anu]

can somebody explain these three questions.
Answers:
22.A, 23.B,24.A

 

[totalljerkface]

can somebody explain these three questions.
Answers:
22.A, 23.B,24.A
View attachment 51368View attachment 51369

What paper is that?? cie??? ocr

 

[princess Anu]

it's from IB

 

[Bba321]

In qs 9 part http://papers.xtremepapers.com/CIE/...nd AS Level/Physics (9702)/9702_s11_qp_41.pdf

Qs 9 part b 1 I know the resistance of thermistor os 2.5kohms but what about x?

 

[Muskan Achhpilia]

Hey,
Can someone help me out with the following mcqs all are from 2002 summer paper.I have written the answers too.

Ans D


Ans B


Ans C


Ans A


Ans C


Ans C

Thank you very much!

 

[Muskan Achhpilia]

check q114 at
http://physics-ref.blogspot.com/2014/11/physics-9702-doubts-help-page-21.html

Thanks a lot and if you get the other questions please let me know!

 

[The Godfather]

Q5
Q10
Q21
http://onlineexamhelp.com/wp-content/uploads/2014/08/9702_s14_qp_12.pdf

 

[Muskan Achhpilia]

Help please with the following mcqs

A


C


D

Thanks!

 

[amal sharkawi]

 

[Aqsa Ghaffar]

Can anyone provide me with the physics p5 notes? I am having difficulty in solving Question 1 of p5

 

[The Sarcastic Retard]

Help please with the following mcqs
View attachment 51379
A

View attachment 51380
C

View attachment 51381
D

Thanks!

20)
1*p/10 = rho * g * h
h = p/(10 * rho * g) = A

28) Taking O as theta and l as lambda
dsinO=nl
(1*10^(-6))sin35= 1l
l = 5.74*10^(-7) = 574nm = C

40)
YET NOT DONE IN OUR SYLLABUS. SORRY