Physics: Post your doubts here!

[***amd***]

http://papers.xtremepapers.com/CIE/...and AS Level/Physics (9702)/9702_s03_qp_4.pdf
Q1 ci)
Q2 b)
Q5 di) dii)
@cardude456, @Afzal1, @Kumkum, @shazmina anyone?

 

[Kumkum]

http://papers.xtremepapers.com/CIE/...and AS Level/Physics (9702)/9702_s03_qp_4.pdf
Q1 ci)
Q2 b)
Q5 di) dii)
@cardude456, @Afzal1, @Kumkum, @shazmina anyone?

1 ci) since your're asked to find the change in gravitational potential, use this formula: -GM/r
so it'll be:
(6.67*10^-11 * 6*10^24) / (6.4*6 - 1.3*10^7) = -6.06*10^7 (i'm not sure about the answer)
the radius's have been changed to meters

2 b) not so sure, sorry

5 di) since it's an alpha particle it will deflect upwards, but not so much.
dii) since it's a beta particle, it will deflect downwards. the deflection will be large.
i think it's like this:


hope u got it

 

[Kim Shaw]

Thanks you sis

No prob

 

[Kim Shaw]

http://papers.xtremepapers.com/CIE/...and AS Level/Physics (9702)/9702_s03_qp_4.pdf
Q1 ci)
Q2 b)
Q5 di) dii)
@cardude456, @Afzal1, @Kumkum, @shazmina anyone?

for question 2b...
ok, so final temperature is mpt of gold, which is 1340
also, 5% of mixture will be silver, so 95% will be gold
formula used heat=mcdt, during change in state=mlf
dT(change in temp)= (whatever very high temp of gold which we don't knw of) - 1340
the heat lost by the gold=the heat gained by the silver(given that no heat is lost to the surroundings)
heat lost by gold=(0.95m x 129 x dT)
heat gained by silver: so we have to heat silver till it is solid at its mpt. then heat more until it is liquid at its mpt. THEN heat more for it to reach mpt of gold
therefore, heat gained by silver=(o.o5m x 235 x (1240-(27+273.15))) + (0.05m x 105 x 1000) + (0.05m x 235 x (1340-1240))
equate both these and m will cancel out, and tada!! dT=143K(3sf)
dT=initial temp of gold when silver was added-1340
thus ans=143+1340=1483
and here, dear friend, is the most simple and comprehensive way that i could explain a question like that. But don't hesitate to ask anything u don't understand in what i've scribbled up top

 

[periyasamy]

Hi guys.Can anyone solve my problem here.For the picture i post below,did i draw it rightly in terms that there is only one force acting between moon n earth n that is ONLY an attractive force

 

[periyasamy]

Hi guys.Can anyone solve my problem here.For the picture i post below,did i draw it rightly in terms that there is only one force acting between moon n earth n that is ONLY an attractive force

Sorry guys i just google searched n saw this picture but i dont reallly understand why it is saif that the force acting for moon is opposite for the force acting on earth.Anybody can help me.Thanks.

 

[saadkhan97]

any one please help me with this question

http://papers.xtremepapers.com/CIE/...nd AS Level/Physics (9702)/9702_s11_qp_23.pdf

Question number 6 part b

 

[saadkhan97]

any one please help me with this question

http://papers.xtremepapers.com/CIE/...nd AS Level/Physics (9702)/9702_s11_qp_23.pdf

Question number 6 part b please urgent

 

[saadkhan97]

any one please help me with this question

http://papers.xtremepapers.com/CIE/...nd AS Level/Physics (9702)/9702_s11_qp_23.pdf

Question number 6 part b please urgent

 

[saadkhan97]

any one please help me with this question

http://papers.xtremepapers.com/CIE/...nd AS Level/Physics (9702)/9702_s11_qp_23.pdf

Question number 6 part b please urgent

 

[daredevil]

Sorry guys i just google searched n saw this picture but i dont reallly understand why it is saif that the force acting for moon is opposite for the force acting on earth.Anybody can help me.Thanks.

i think it is the fact that Earth's gravitational force is acting on the moon which is towards the center of the Earth (direction) whilethe moon's gravitational force acts on the Earth and is towards the center of the moon .... thus being opposite. just a theory... i'm not confirm.

 

[hellangel1]

Help
http://papers.xtremepapers.com/CIE/...nd AS Level/Physics (9702)/9702_s11_qp_21.pdf
please someone tell how to do question 5 part b..

 

[daredevil]

Help
http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_s11_qp_21.pdf
please someone tell how to do question 5 part b..

maximum possible I2 is possible when the potentiometer is set at its highest resistance value such that no current passes through the potentiometer... ALL the current of the circuit is passing through the fixed resistor as I2.
The least I2 is when the potentiometer is set at its least value. Calculate the current passing through the potentiometer and the fixed resistor relatively. Remember that the Voltage is same for both ; the potentiometer as well as the fixed resistor.

If you don't get it then tell me

 

[hellangel1]

maximum possible I2 is possible when the potentiometer is set at its highest resistance value such that no current passes through the potentiometer... ALL the current of the circuit is passing through the fixed resistor as I2.
The least I2 is when the potentiometer is set at its least value. Calculate the current passing through the potentiometer and the fixed resistor relatively. Remember that the Voltage is same for both ; the potentiometer as well as the fixed resistor.

If you don't get it then tell me

Thanku so much

 

[ahmed abdulla]

My new Thread :
With notes + practical tips ect
Have a look { https://www.xtremepapers.com/commun...al-tips-some-important-notes-dont-miss.31108/ }

 

[saadkhan97]

any one please help me with this question

http://papers.xtremepapers.com/CIE/...nd AS Level/Physics (9702)/9702_s11_qp_23.pdf

Question number 6 part b please urgent

 

[1357911]

@Kim Shaw
Can u please help me with the following questions.
http://olevel.sourceforge.net/papers/9702/9702_s13_qp_11.pdf
Q-18
Q-17
Q-16
Q-11
Q-8
id be really grateful

 

[Hassan Ali Abid]

Can anyone please ans me why the magnitute of induced emf increases in the coil when it is rotated when it is places beside a current carring wire ? Do more magnetism flux linkage are cut when coil is rotated ?

 

[GlitteringLights]

Can anyone plz explain ques 4 part (c) please? thank you
http://olevel.sourceforge.net/papers/9702/9702_s13_qp_43.pdf

 

[M Ahmed Khan]

#h

Hi everyone, AsSalamoAlaikum Wr Wb...

To get things organized in a better way, I am making this thread. As othewise, some queries remain unanswered!

So post your PHYSICS doubts in this thread. InshaAllah other people here will help me and you all.

NOTE: If any doubts in the pastpapers, please post the link! You can find links here!

Any Physics related notes and links will be added here in this post. Feel free to provide the links to your notes around the forum, or any other websites!
Thanks!
Jazak Allah Khair!

Physics Notes:

Some links & Notes - by destined007

As physics p1 MCQS YEARLY Solved [explaination]
Physics Practical Tips - by arlery

Notes for A2 Direct Sensing (Applications) - shared by sweetiepie

Physics Summarised Notes (Click to download)

AS and A-Level Physics Definitions

A2: Physics Revision notes - by smzimran

Paper:5 Finding uncerainty in log - by XPFMember

Physics Paper 5 tips - by arlery

Physics Compiled Pastpapers: <Credits to CaptainDanger for sharing this..>

Here are the compiled A level topical Physics questions in PDF form...

Paper 1 : http://www.mediafire.com/?tocg6ha6ihkwd

Paper 2 & Paper 4 : http://www.mediafire.com/?g65j51stacmy33c

(Source : http://www.alevelforum.com/viewtopic.php?f=15&t=14)[/quote

Hi everyone, AsSalamoAlaikum Wr Wb...

To get things organized in a better way, I am making this thread. As othewise, some queries remain unanswered!

So post your PHYSICS doubts in this thread. InshaAllah other people here will help me and you all.

NOTE: If any doubts in the pastpapers, please post the link! You can find links here!

Any Physics related notes and links will be added here in this post. Feel free to provide the links to your notes around the forum, or any other websites!
Thanks!
Jazak Allah Khair!

Physics Notes:

Some links & Notes - by destined007

As physics p1 MCQS YEARLY Solved [explaination]
Physics Practical Tips - by arlery

Notes for A2 Direct Sensing (Applications) - shared by sweetiepie

Physics Summarised Notes (Click to download)

AS and A-Level Physics Definitions

A2: Physics Revision notes - by smzimran

Paper:5 Finding uncerainty in log - by XPFMember

Physics Paper 5 tips - by arlery

Physics Compiled Pastpapers: <Credits to CaptainDanger for sharing this..>

Here are the compiled A level topical Physics questions in PDF form...

Paper 1 : http://www.mediafire.com/?tocg6ha6ihkwd

Paper 2 & Paper 4 : http://www.mediafire.com/?g65j51stacmy33c

(Source : http://www.alevelforum.com/viewtopic.php?f=15&t=14)

When a body accelerates from rest would the net resultant force acting on it remain constant or is it going to increase