Physics: Post your doubts here!

[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.

 

[P1O2I3U4]

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.

Yes, I already tried that but I am getting 746 whereas the answer is 740.

 

[Hassan Ali Abid]

Yes, I already tried that but I am getting 746 whereas the answer is 740.

the ans in ms is round off to 3sf...so ur ans much be less then 745 then when it will be roundoff to 3sf it will get to 740. You must have made some mistake in a calculation ....try to use the accurate values and then find the final ans ...see if it gets to 740 or not .

 

[P1O2I3U4]

the ans in ms is round off to 3sf...so ur ans much be less then 745 then when it will be roundoff to 3sf it will get to 740. You must have made some mistake in a calculation ....try to use the accurate values and then find the final ans ...see if it gets to 740 or not .

Unfortunately I am still not getting the answer. Have you tried to solve it yourself? Please try and see.

 

[P1O2I3U4]

the ans in ms is round off to 3sf...so ur ans much be less then 745 then when it will be roundoff to 3sf it will get to 740. You must have made some mistake in a calculation ....try to use the accurate values and then find the final ans ...see if it gets to 740 or not .

I am actually getting 746.6

 

[Hassan Ali Abid]

I am actually getting 746.6

im also having the same ans ie 746.6029.......

 

[P1O2I3U4]

im also having the same ans ie 746.6029.......

Exactly! Now what to do!