Physics: Post your doubts here!

[Awesome12]

check again

Now it much better. Thanks

 

[PlutoHuman]

Bit help in this one would be appreciated

 

[Awesome12]

http://papers.xtremepapers.com/CIE/...nd AS Level/Physics (9702)/9702_w10_qp_22.pdf

Question 2 (a) ii)

Why do I get an incorrect answer when I use the formula?:

v^2 - u^2 = 2as

- (7.29)^2 = 2 (-9.81) (s)

Furthermore, the marking scheme doesn't mention this formula? Why can't I use it?

 

[Abeha Malik]

a : 4sec
b : Distance of motorist will be 238.4 Km and for police car : 278.4 Km

Are those answers correct?

No the correct answers are 50s and 2000m

 

[tiki-taka]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_w10_qp_22.pdf

Question 2 (a) ii)

Why do I get an incorrect answer when I use the formula?:

v^2 - u^2 = 2as

- (7.29)^2 = 2 (-9.81) (s)

Furthermore, the marking scheme doesn't mention this formula? Why can't I use it?

h is not the max-height so V is not zero
use S=ut+0.5at^2

 

[Bba321]

http://physics-ref.blogspot.com/2014/10/9702-june-2014-paper-12-worked.html

Thanks

 

[divyaa96]

Hey could anyone help me with this question?

A car travelling with speed 28 ms-1 leaves a motorway on an exit road. The end of the exit road is 22m higher than the motorway. If only the force of gravity is considered, what will be the speed of the car at the end of the exit road?

A. 7.3 ms-1
B. 19 ms-1
C 21 ms-1
D 24 ms-1

I'd appreciate it if someone could explain to me how to do this question! Thanks

 

[Bba321]

Please explain qs 5,9,37

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_w10_qp_11.pdf

And qs 26 from
http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_w11_qp_12.pdf

Qs 7 and 25 from

http://papers.xtremepapers.com/CIE/...nd AS Level/Physics (9702)/9702_w10_qp_12.pdf
Thanks

 

[PlutoHuman]

why paper is this? i alreadt solved this. it's available @
http://physics-ref.blogspot.com/

search in the papers there

Its may june 2014 question paper 11

 

[akshay 999]

can someone help me wiz zis question plz.
Monochromatic light of wavelength 690 nm passes through a diffraction grating with 300 lines per mm, producing a series of maxima on a screen.What is the greatest number of maxima that can be observed?

 

[akshay 999]

check qu 30 at
http://physics-ref.blogspot.com/2014/08/9702-november-2012-paper-12-worked.html

thanks that has help me a lot

 

[xlixin]

Hello people, anyone mind explaining question 26 to me?
I dont get why can't they have the same amplitude . Thanks

http://papers.xtremepapers.com/CIE/...nd AS Level/Physics (9702)/9702_s11_qp_12.pdf

 

[NinjaInPyjamas]

http://www.xtremepapers.com/papers/...nd AS Level/Physics (9702)/9702_w10_qp_43.pdf

q 3 (b) how to calculate d from phase difference?

 

[xlixin]

check at
http://physics-ref.blogspot.com/2014/09/9702-june-2011-paper-12-worked.html

thank you!

 

[PlutoHuman]

http://physics-ref.blogspot.com/2014/11/9702-june-2014-paper-11-worked.html

Thank you!

 

[manutd96]

http://papers.xtremepapers.com/CIE/...nd AS Level/Physics (9702)/9702_s11_qp_12.pdf

ques 30, can someone explain to me how an increase in value of resistor increase the pd between plates?

 

[controlled.chaos]

1. Assalam o alaikum people!
   Im in AS level. And I have my mid year papers frm 8 dec. :3 so kindly help me in these questions.. thanks already. :')
   
   
   1. A mass of a liquid of density ρ is thoroughly mixed with an equal mass of another liquid of density
   2ρ. No change of the total volume occurs.
   What is the density of the liquid mixture?
   A 4/3ρ B 3/2ρ C 5/3ρ D 3ρ
   
   2.
   4 Pollen grains are suspended in a liquid and are illuminated strongly. When observed under a
   microscope they are seen to be in continuous random motion.
   What is the reason for this?
   A convection currents in the liquid
   B evaporation of the liquid
   C molecules of the liquid colliding with the pollen grains
   D pollen grains colliding with each other
   

 

[aliciaa]

http://papers.xtremepapers.com/CIE/...nd AS Level/Physics (9702)/9702_s13_qp_11.pdf

Can someone explain no. 18, 19 and 35 please?
Answers are all B's.

For no. 35, since it's parallel circuit, shouldn't V be same throughout, so PD = 0?

 

[Thought blocker]

Wslm.
view qu 114 at
http://physics-ref.blogspot.com/2014/11/physics-9702-doubts-help-page-21.html
for the 1st question.
the other one will be added soon

1. Assalam o alaikum people!
   Im in AS level. And I have my mid year papers frm 8 dec. :3 so kindly help me in these questions.. thanks already. :')
   
   
   1. A mass of a liquid of density ρ is thoroughly mixed with an equal mass of another liquid of density
   2ρ. No change of the total volume occurs.
   What is the density of the liquid mixture?
   A 4/3ρ B 3/2ρ C 5/3ρ D 3ρ
   
   2.
   4 Pollen grains are suspended in a liquid and are illuminated strongly. When observed under a
   microscope they are seen to be in continuous random motion.
   What is the reason for this?
   A convection currents in the liquid
   B evaporation of the liquid
   C molecules of the liquid colliding with the pollen grains
   D pollen grains colliding with each other

1)

2) Brownian motion, the molecules of liquid collide with the molecules of the pollen grains.

 

[Sewz44]

Do you all know good websites for AS level physics.....
I need a good note of OSCILLATIONS AND WAVES MODULE......
So can anyone upload a good note for me please?