Physics: Post your doubts here!

[Thought blocker]

Can someone send me the link to that thread which has the solved past papers????? PLEASEEE!!

Thnx1

I had seen somewhere but don't remember :/

 

[NamelessIguana]

whts

the ans is it A?

Which year is it?

 

[ZaqZainab]

I had seen somewhere but don't remember :/

https://www.xtremepapers.com/community/threads/as-physics-p1-mcqs-yearly-only.17330/

 

[ashoo123]

I had seen somewhere but don't remember :/

Ohh!

 

[ashoo123]

https://www.xtremepapers.com/community/threads/as-physics-p1-mcqs-yearly-only.17330/

THANK YOU!! <3

 

[ashoo123]

Could u pls help with q25?? http://papers.xtremepapers.com/CIE/...nd AS Level/Physics (9702)/9702_s11_qp_11.pdf

Thnk u!

 

[Thought blocker]

Could u pls help with q25?? http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_s11_qp_11.pdf

Thnk u!

Use the formula (2n - 1)*75
i.e, for n = 1 we have frequency of 75Hz
we are asked for n = 2,3
n = 2 --> 3*75 = 225
n = 3 --> 5*75 = 375
Hence answer is D

 

[ashoo123]

Use the formula (2n - 1)*75
i.e, for n = 1 we have frequency of 75Hz
we are asked for n = 2,3
n = 2 --> 3*75 = 225
n = 3 --> 5*75 = 375
Hence answer is D

WOW! Tht was easyyy and here i was trying all sorts of mumbo jumbo
Thank you

 

[..sacrifice4Revenge..]

Use the formula (2n - 1)*75
i.e, for n = 1 we have frequency of 75Hz
we are asked for n = 2,3
n = 2 --> 3*75 = 225
n = 3 --> 5*75 = 375
Hence answer is D

And what if it was a closed pipe instead..

 

[Thought blocker]

And what if it was a closed pipe instead..

n*75

 

[..sacrifice4Revenge..]

n*75

Thanks, dint knw this beforw. Now i can forget all the fundamental frequency crap i memorised :3

 

[Thought blocker]

Thanks, dint knw this beforw. Now i can forget all the fundamental frequency crap i memorised :3

What did you memorized ?

 

[crazytaylorfanXD]

http://papers.xtremepapers.com/CIE/...nd AS Level/Physics (9702)/9702_w11_qp_11.pdf

Qs 5 , 6, 12 (why not D) , 16 , 23 , 28 , 22(why not c)

please helpp :/

 

[..sacrifice4Revenge..]

What did you memorized ?

To solve questuons i suppose?! -_-


MJ 10, q15, hows it D?
and q5

 

[Thought blocker]

To solve questuons i suppose?! -_-


MJ 10, q15, hows it D?
and q5

Link

 

[ZaqZainab]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_w11_qp_11.pdf

Qs 5 , 6, 12 (why not D) , 16 , 23 , 28 , 22(why not c)

please helpp :/

Q5 B as d has a square and when we write the percentage uncertinty
we will write it as 2(uncertinity of d)/d *100

Q6 the time for it to move from X to Y will be less than time for Y to Z
so B and C are wrong
the acceleration from X to Y is NOT equat to Y to Z and so D is wrong

Q12 why not D cause when the ice-hockey puck moves back it havs a negative velocity and forward was positive and so momentum=m*v will be negative

Q16 it is inelastic collision because they travel together
Ek=0.5mv^2
after collision the mass will be doubled
0.5*2*mv^2 =mv^2
so mv^2=0.5mv^2/2=Ek/2

 

[..sacrifice4Revenge..]

Link

http://papers.xtremepapers.com/CIE/... AS Level/Chemistry (9701)/9701_s10_qp_12.pdf

 

[..sacrifice4Revenge..]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_w11_qp_11.pdf

Qs 5 , 6, 12 (why not D) , 16 , 23 , 28 , 22(why not c)

please helpp :/

6 A as energy will be lost on collision, velocity would be less and so it would take more time to travel ZY now

 

[Thought blocker]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Chemistry (9701)/9701_s10_qp_12.pdf

Chemistry ?

 

[..sacrifice4Revenge..]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_w11_qp_11.pdf

Qs 5 , 6, 12 (why not D) , 16 , 23 , 28 , 22(why not c)

please helpp :/

22, it is C. Congrts
23, youngs modulus for one material is always the same no matter what length u take etc, so its steel in both cases and it remains E