Physics: Post your doubts here!

[Musab100]

There was absolutely no reason for you to have argued with someone publicly in a formal thread over such a petty thing.


You should not have said this. And many other things.


Honestly, if there is anyone who is not in his/her limits, it's you. Using a language other than English in a proper thread, and that too an insulting one, is not allowed at all. So, you better watch what you are doing before telling others what to do and what not to.

And next time when you people find a post offensive, simply report it, and we will handle the rest. Do not act as backseat moderators.

well done Nibz the way u ended all this fight

 

[usama321]

can any1 help me with mcq 21
http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_w12_qp_13.pdf

There is more pressure near Y due to the height of the column. The water therefore is compressed and thus gains elastic potential energy.

As the rate of flow is constant, kinetic energy is out of the options.

 

[***amd***]

There was absolutely no reason for you to have argued with someone publicly in a formal thread over such a petty thing.


You should not have said this. And many other things.


Honestly, if there is anyone who is not in his/her limits, it's you. Using a language other than English in a proper thread, and that too an insulting one, is not allowed at all. So, you better watch what you are doing before telling others what to do and what not to.

And next time when you people find a post offensive, simply report it, and we will handle the rest. Do not act as backseat moderators.

I apologize for that. i am sorry sma786

 

[sma786]

I apologize for that. i am sorry sma786

Its fine

 

[danial 234]

can any1 solve this??

 

[hafizhah]

Can someone explain to me how to do may june 2004 paper 4 qn 3cii? :/

 

[usama321]

can any1 solve this??View attachment 37092

Moment due to child = 5 * 40g = 200g
As it is in equilibrium, the upward force at the spring would be
200g = 2 * F
F = 100g

100g = 10000 * compression
compression = 9.81 cm
C it is

 

[ahmed abdulla]

 

[usama321]

View attachment 37096

y = mx + c
m = 190 - 3840/ 100
m = -36.5
c = 3840

2300 = -36.5x + 3840
x = 42.2

 

[Muhammad TAimoor]

http://papers.xtremepapers.com/CIE/...and AS Level/Physics (9702)/9702_s05_qp_4.pdf
Q3, b ii. Can anybody explain the steps?

 

[1357911]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_s05_qp_4.pdf
Q3, b ii. Can anybody explain the steps?

p = Nmc^2/3v
pv = Nmc^2/3
divide the numerator and the denominator by 2. If u divide and multiply by the same number, the ans is the same.
pv = 2N/3 (1/2 mc^2)
pv = Nrt and when N = 1 then pv = RT
so
RT = 2/3 N x KE (that 1/2 mc^2 is written as KE here)
3/2 (R/N) x T = KE
R/N = k (the Boltzman constant)
so
3/2 kT = KE

 

[Muhammad TAimoor]

p = Nmc^2/3v
pv = Nmc^2/3
divide the numerator and the denominator by 2. If u divide and multiply by the same number, the ans is the same.
pv = 2N/3 (1/2 mc^2)
pv = Nrt and when N = 1 then pv = RT
so
RT = 2/3 N x KE (that 1/2 mc^2 is written as KE here)
3/2 (R/N) x T = KE
R/N = k (the Boltzman constant)
so
3/2 kT = KE

Thanks but it's Q3 b ii part actually. You answered Q2

 

[1357911]

Thanks but it's Q3 b ii part actually. You answered Q2

My sincere Apologies.


I hope i am right?? Correct me If Im wrong.

 

[williamcwz]

Physics paper1 October November 2003 no.31 pls

 

[Muhammad TAimoor]

My sincere Apologies.

View attachment 37126
I hope i am right?? Correct me If Im wrong.

Perfecto! Thanks alott!

 

[Igcse stuff]

For phy applications memories each and everything in the ms ...like the ans of all essay/long questions ....and for core syllabus learn the definations from ms ..not from the book.
For p5 dont attempt the Q1 in point form.

Thanks a lot

 

[hacker]

The answer is B but why not A ?? please someone explain this

 

[usama321]

View attachment 37184

The answer is B but why not A ?? please someone explain this

Area X would be the heat energy lost as the band returns to its original position...

It is b because E = F * d or in this case total area under the graph

 

[Snackbox86]

Hey,I have a few MCQ AS physics questions i need help with
Q 14, 20
http://papers.xtremepapers.com/CIE/...nd AS Level/Physics (9702)/9702_w09_qp_12.pdf
Thank you

 

[usama321]

Hey,I have a few MCQ AS physics questions i need help with
Q 14, 20
http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_w09_qp_12.pdf
Thank you

Using conservation of momentum, the velocity of the 1kg trolley would be
2*2 = 1* x
x = 4 m/s

now total kinetic energy of the two trolleys would be equal to the total energy released from the spring

1/2 * 2 * 4 + 1/2 * 1 * 16
= 12 J

For the 20th one, the strain energy would be the area under the graph...
By just taking a triangle, we get
1/2 * .002 * 100 = .1
However, we will also consider the upwards bend of the curve.. Therefore, the answer has to be more than .1... Now, it can't be D because D is too large. D would actually equal to the area of the whole square if we don't multiply our number with 1/2... Therefore, it has to be C.