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Author Topic: ALL CIE PHYSICS DOUBTS HERE !!!  (Read 171890 times)

Offline HUSH1994

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Re: ALL CIE PHYSICS DOUBTS HERE !!!
« Reply #585 on: May 10, 2011, 06:23:10 am »
is this A2?
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Offline your sister

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Re: ALL CIE PHYSICS DOUBTS HERE !!!
« Reply #586 on: May 10, 2011, 06:32:33 am »
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Offline aldehyde1612

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Re: ALL CIE PHYSICS DOUBTS HERE !!!
« Reply #587 on: May 10, 2011, 07:15:43 am »
Quote from: your sister on May 10, 2011, 05:12:16 am
1. graph of gravitational potential and radius : gradient gives gravitational field strength

2. graph of gravitational force and radius : gradient gives gravitational field strength


which one is correct 1 or 2 ??

1. is right...

gradient would be Grav.Potential/ radius. Potential=GM/r .. so that divided by 'r' give GM/r^2 ... which is the Grav.Field Strength per unit mass. right??
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Offline your sister

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Re: ALL CIE PHYSICS DOUBTS HERE !!!
« Reply #588 on: May 10, 2011, 07:30:37 am »
Quote from: aldehyde1612 on May 10, 2011, 07:15:43 am
1. is right...

gradient would be Grav.Potential/ radius. Potential=GM/r .. so that divided by 'r' give GM/r^2 ... which is the Grav.Field Strength per unit mass. right??

ya you gottaay point :)
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LA ILAHA ILLA ANTA SUBHANAKA INNI KUNTU MINAZ ZALIMEEN

http://www.scribd.com/doc/17621/Remedies-From-the-Holy-QurAn

http://maniacmuslim.com/forums/index.php?/topic/8912-specific-duas-for-students/ 

remember me in your prayers(:
Proud to be a Pakistani
i've got green blood (:
CriCket<3

Offline your sister

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Re: ALL CIE PHYSICS DOUBTS HERE !!!
« Reply #589 on: May 10, 2011, 07:56:40 am »
difference between magnetic flux linkage and magnetic flux denstiy (with definitions)

thankyou :D
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LA ILAHA ILLA ANTA SUBHANAKA INNI KUNTU MINAZ ZALIMEEN

http://www.scribd.com/doc/17621/Remedies-From-the-Holy-QurAn

http://maniacmuslim.com/forums/index.php?/topic/8912-specific-duas-for-students/ 

remember me in your prayers(:
Proud to be a Pakistani
i've got green blood (:
CriCket<3

Offline EMO123

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Re: ALL CIE PHYSICS DOUBTS HERE !!!
« Reply #590 on: May 10, 2011, 08:12:06 am »
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Offline your sister

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Re: ALL CIE PHYSICS DOUBTS HERE !!!
« Reply #591 on: May 10, 2011, 01:19:08 pm »
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LA ILAHA ILLA ANTA SUBHANAKA INNI KUNTU MINAZ ZALIMEEN

http://www.scribd.com/doc/17621/Remedies-From-the-Holy-QurAn

http://maniacmuslim.com/forums/index.php?/topic/8912-specific-duas-for-students/ 

remember me in your prayers(:
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CriCket<3

Offline TJ-56

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Re: ALL CIE PHYSICS DOUBTS HERE !!!
« Reply #592 on: May 10, 2011, 01:23:33 pm »
Can someone help with the following paper 4 questions:
May June 2002 Q4 (b) Posted, just want to make sure it is correct.
May June 2002 Q6 (a) Posted as well,  though I have no idea how to draw it.
October November 2002 Q1 (b) is it an under or over estimation? pls explain
October November 2002 Q3 (b) (ii) pls explain as well

I would greatly appreciate help for any of the questions
thanx!
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Offline your sister

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Re: ALL CIE PHYSICS DOUBTS HERE !!!
« Reply #593 on: May 10, 2011, 01:23:41 pm »
P4 oct/nov 05

ques 3, b, i

ms says      = 3050 J
but i am getting 3047

is it fine if i use my answer in the iii part ?

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LA ILAHA ILLA ANTA SUBHANAKA INNI KUNTU MINAZ ZALIMEEN

http://www.scribd.com/doc/17621/Remedies-From-the-Holy-QurAn

http://maniacmuslim.com/forums/index.php?/topic/8912-specific-duas-for-students/ 

remember me in your prayers(:
Proud to be a Pakistani
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Offline TJ-56

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Re: ALL CIE PHYSICS DOUBTS HERE !!!
« Reply #594 on: May 10, 2011, 01:26:42 pm »
Quote from: your sister on May 10, 2011, 01:23:41 pm
P4 oct/nov 05

ques 3, b, i

ms says      = 3050 J
but i am getting 3047

is it fine if i use my answer in the iii part ?



The required answer should probably be rounded to 3 significant figures, so your answer should be correct, because 3047 becomes 3050.
hope that was helpful
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Offline your sister

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Re: ALL CIE PHYSICS DOUBTS HERE !!!
« Reply #595 on: May 10, 2011, 01:47:32 pm »
Quote from: TJ-56 on May 10, 2011, 01:26:42 pm
The required answer should probably be rounded to 3 significant figures, so your answer should be correct, because 3047 becomes 3050.
hope that was helpful


is it because the values given in the question are to 3sf ??
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LA ILAHA ILLA ANTA SUBHANAKA INNI KUNTU MINAZ ZALIMEEN

http://www.scribd.com/doc/17621/Remedies-From-the-Holy-QurAn

http://maniacmuslim.com/forums/index.php?/topic/8912-specific-duas-for-students/ 

remember me in your prayers(:
Proud to be a Pakistani
i've got green blood (:
CriCket<3

Offline TJ-56

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Re: ALL CIE PHYSICS DOUBTS HERE !!!
« Reply #596 on: May 10, 2011, 01:50:26 pm »
Quote from: your sister on May 10, 2011, 01:47:32 pm

is it because the values given in the question are to 3sf ??
Yup, thats exactly why. All of them are to 3sf if you have noticed.
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Offline Sue T

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Re: ALL CIE PHYSICS DOUBTS HERE !!!
« Reply #597 on: May 10, 2011, 02:08:55 pm »
Quote from: TJ-56 on May 10, 2011, 01:23:33 pm
Can someone help with the following paper 4 questions:
May June 2002 Q4 (b) Posted, just want to make sure it is correct.
May June 2002 Q6 (a) Posted as well,  though I have no idea how to draw it.
October November 2002 Q1 (b) is it an under or over estimation? pls explain
October November 2002 Q3 (b) (ii) pls explain as well

I would greatly appreciate help for any of the questions
thanx!
mj 2002 Q4b) yes its ryt
mj 2002 Q6a) https://studentforums.biz/sciences-149/physics-doubts-12323/ (last post last attachment):
nov 2002 Q 1b) see you used: Pt=mL ryt? now if u include energy losses (lets call them S)
Pt - S = mL
so ur L was an overestimation, since th ryt equation involves subtracting energy loss to surroundings.
nov 2002 Q 3bii) imagine a child on a swing, you push it at the right time to give it more amplitude - so if its resonant frequency is fo you provide a frequency of f0
but if you push it once yes and once no (as in alternate cycles) u are providing a frequency of 1/2f0 - you still build up amplitude but its not the max
hope i helped


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Offline TJ-56

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Re: ALL CIE PHYSICS DOUBTS HERE !!!
« Reply #598 on: May 10, 2011, 02:26:36 pm »
Quote from: Sue T on May 10, 2011, 02:08:55 pm
mj 2002 Q4b) yes its ryt
mj 2002 Q6a) https://studentforums.biz/sciences-149/physics-doubts-12323/ (last post last attachment):
nov 2002 Q 1b) see you used: Pt=mL ryt? now if u include energy losses (lets call them S)
Pt - S = mL
so ur L was an overestimation, since th ryt equation involves subtracting energy loss to surroundings.
nov 2002 Q 3bii) imagine a child on a swing, you push it at the right time to give it more amplitude - so if its resonant frequency is fo you provide a frequency of f0
but if you push it once yes and once no (as in alternate cycles) u are providing a frequency of 1/2f0 - you still build up amplitude but its not the max
hope i helped




Wow, thanks, that was REALLY REALLY helpful, I really appreciate the help
+rep
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Offline TJ-56

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Re: ALL CIE PHYSICS DOUBTS HERE !!!
« Reply #599 on: May 10, 2011, 02:58:00 pm »
May June 2005 Q6 (b) Posted, again i just want to make sure its the correct answer
thanx
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