Physics: Post your doubts here!

[goodluckayesha]

Q. Explain the principles of the generation and detection of ultrasound waves (6marks)
plz give a proper answer to this this question is from oct-nov2011 question 10
thnx

 

[Hassan Ali Abid]

Q. Explain the principles of the generation and detection of ultrasound waves (6marks)
plz give a proper answer to this this question is from oct-nov2011 question 10
thnx

Just learn the ms as it is ....It will be enough to gain the marks.

 

[sitooon]

View attachment 36715

thanks bro

 

[periyasamy]

Hai guys,need a help here.Thanks in advance.
http://papers.xtremepapers.com/CIE/...nd AS Level/Physics (9702)/9702_w10_qp_43.pdf
Question 3a(part1).The answer is 8cm.

 

[mm89mm]

Hey,

So the question is about Work, Energy and Power.
It's in Chapter 5, page 78, Test Yourself 4
I need help, if required I can post a photo with th question later.
Thanks in advance

 

[LeQuavina]

Salam everyone.
I have a problem with paper 51/ M/J/ 13
Question number 2 a) I dont understand why is the gradient 1/EW and not E/W since C is replaced as x in the formula y=mx+c and c is 1/E .
and in d)i) we get the y-intercept from the graph,right? I got it as 0183 and I used with it the uncertainty i got from the line of best fit and worst acceptble line gradients formula. and what about d)ii and iii?

 

[snowbrood]

Hai guys,need a help here.Thanks in advance.
http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_w10_qp_43.pdf
Question 3a(part1).The answer is 8cm.

equilibrium line lies in between the distance from AB to CD amplitude is 4cm as evident from the equation so 2*4cm =8cm which the answer

 

[Munks28]

Hello all! I posted a question on TSR but am not getting a reply.
So help me out there, it's all solved. I just need to figure out one little thing. Here's the link:
http://www.thestudentroom.co.uk/showthread.php?t=2613841

 

[snowbrood]

Hello all! I posted a question on TSR but am not getting a reply.
So help me out there, it's all solved. I just need to figure out one little thing. Here's the link:
http://www.thestudentroom.co.uk/showthread.php?t=2613841

well u can do that but you got to know the force that is acted on A so we have to take the moment about A so that we could safely work out things. if u take moments about C find the force at A. ty

 

[Yousif Mukkhtar]

Hey guys can someone explain Q9 b) and how the answer was obtained
http://papers.xtremepapers.com/CIE/...and AS Level/Physics (9702)/9702_s09_qp_4.pdf

 

[lawman]

topic 1 notes

 

[Abdelrahman mahmoud]

guys , i want the physics as mark scheme November 2002 (9702)

 

[Asad rehman]

Re: Physics Help here! Stuck somewhere?? Ask here!

 

[Abdelrahman mahmoud]

i want the physics as mark scheme November 2002

 

[Asad rehman]

but then how clockwise moment becomes equal to anticlockwise moments

 

[P1O2I3U4]

http://papers.xtremepapers.com/CIE/...and AS Level/Physics (9702)/9702_s06_qp_4.pdf
Can anyone please help me with Question 2 b (ii) and Question 1c . Please explain the reasoning behind your steps also. Thanks in advance.

 

[mm89mm]

salams,
so i've got 2 questions that need checking.
I will provide everything, you just need to read.

1st question
It's about forces


The answer


And the other question and answer.



Thanks in advance.

 

[Hassan Ali Abid]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_s06_qp_4.pdf
Can anyone please help me with Question 2 b (ii) and Question 1c . Please explain the reasoning behind your steps also. Thanks in advance.

use pV=nRT.
Pressure is given , the volume given must be converted to dm^3 , ie multiply with 10^-6 , use the value of R ie 8.31 and the temp in kelvin is already given ...put the values in the equations and calculate n ( the number of moles) .

 

[P1O2I3U4]

use pV=nRT.
Pressure is given , the volume given must be converted to dm^3 , ie multiply with 10^-6 , use the value of R ie 8.31 and the temp in kelvin is already given ...put the values in the equations and calculate n ( the number of moles) .

Yes, I got the answer for the first part. But how to find the number of balloons that can be filled?

 

[Hassan Ali Abid]

Yes, I got the answer for the first part. But how to find the number of balloons that can be filled?

using the same formula first calculate the number of moles of gas filled in each balloon ...ryt ...
then ____ moles of gas : 1 ballons (number of balloons)
_______moles calculated in part b(1):x and by this calculate the total number of balloons.

calculate like this and see if the ans is ryt or not.