Physics: Post your doubts here!

[unseen95]

why is the answer of question number 40 'c'. Can anyone please explain. http://papers.xtremepapers.com/CIE/...and AS Level/Physics (9702)/9702_s07_qp_1.pdf

 

[lyuchenqujoy]

why is the answer of question number 40 'c'. Can anyone please explain. http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_s07_qp_1.pdf

That's a hard one.. My teacher had talked about this question before..
F=Vq/d=ma
so a Vq/md
let's take Li as an example, q for Li is 3 but m for Li is 7 (7 nucleons) , so a= 3/7 ( I ignore V and d cuz it's the same)
and after you work out the acceleration for other elements in this way, you will find Li has the smallest acceleration..

 

[unseen95]

That's a hard one.. My teacher had talked about this question before..
F=Vq/d=ma
so a Vq/md
let's take Li as an example, q for Li is 3 but m for Li is 7 (7 nucleons) , so a= 3/7 ( I ignore V and d cuz it's the same)
and after you work out the acceleration for other elements in this way, you will find Li has the smallest acceleration..

thanks man

 

[sweetsis]

can someone please explain mcq 40 of winter 2012 paper 11

 

[nightmaressana]

can someone explain to me kirchoffs second law? even though i get it, im unable to solve the questions related to it.

 

[unseen95]

please explain me question number 24 and 26. http://papers.xtremepapers.com/CIE/...and AS Level/Physics (9702)/9702_s08_qp_1.pdf

 

[Ahmedraza73]

please explain me question number 24 and 26. http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_s08_qp_1.pdf

For question 26: I is directtly propotional to the Amplitude square
and the given propotionality is I is inversely propotional to the the distance X
Now forget this and understand what i'm saying: A Is directly propotional to B,and B is Inversely propotional to the C
so it will be equal to the A is Inversely propitional to the C
NO WHAT THE QUESTION SAYS
I is directtly propotional to the Amplitude square
the given propotionality is I is inversely propotional to the the distance X
SO THE THIRD PROPOTIONALITY WILL BE :
Amplitude^2 inversely proptional to dstance X^2
so a1^2 x1^2=a2^2 X^2
a1^2=8.0 micrometres
x1^2=r
x2^2=2r
a2^2=?
so putting the values we get a=4.0 micrometres

 

[unseen95]

For question 26: I is directtly propotional to the Amplitude square
and the given propotionality is I is inversely propotional to the the distance X
Now forget this and understand what i'm saying: A Is directly propotional to B,and B is Inversely propotional to the C
so it will be equal to the A is Inversely propitional to the C
NO WHAT THE QUESTION SAYS
I is directtly propotional to the Amplitude square
the given propotionality is I is inversely propotional to the the distance X
SO THE THIRD PROPOTIONALITY WILL BE :
Amplitude^2 inversely proptional to dstance X^2
so a1^2 x1^2=a2^2 X^2
a1^2=8.0 micrometres
x1^2=r
x2^2=2r
a2^2=?
so putting the values we get a=4.0 micrometres

thanks man

 

[snowbrood]

http://tinypic.com/r/34p1j61/6 can anyone solve this questions and tell me why the answer is A littlecloud11 einstein

 

[tanmaydube]

can any one solve (i) please it would be great help!

Thank you!

 

[Tkp]

can someone please explain mcq 40 of winter 2012 paper 11

ok just see.isotopes are the atoms of the same element that has same proton number but different neutron number.so u can assume that p has a proton number of 60 and nucelon number of 90.do calculation and u will get b

 

[littlecloud11]

http://tinypic.com/r/34p1j61/6 can anyone solve this questions and tell me why the answer is A littlecloud11 einstein

Smith and Jones are skating on a friction less surface hence, there's no loss of energy before or after throwing the ball. The initial and final speed for both skaters should be the same. Only graph A shows smith and Jones returning to their original speeds after the exchange.

 

[Tkp]

littlecloud11
cn u help m,e in mj03 p1-30
y we need to find the average

 

[snowbrood]

Smith and Jones are skating on a friction less surface hence, there's no loss of energy before or after throwing the ball. The initial and final speed for both skaters should be the same. Only graph A shows smith and Jones returning to their original speeds after the exchange.

but the final speed in graph A is not same as initial speed of both skaters

 

[snowbrood]

Smith and Jones are skating on a friction less surface hence, there's no loss of energy before or after throwing the ball. The initial and final speed for both skaters should be the same. Only graph A shows smith and Jones returning to their original speeds after the exchange.

sorry the correct answer is C

 

[Monojit Saha]

Can anyone solve Oct 10 P13 Number 37.

 

[littlecloud11]

but the final speed in graph A is not same as initial speed of both skaters

It is, the A is a speed time graph, the speed fluctuates between t1 and t2 and then comes back to the same horizontal axis so the speed is same.

 

[Adim Smith]

Aslam-0-Alikum , Jamia
How is every-body, OK i m student of Heriot Watt Dubai, now a days i am doing DEP ( Degree entry Program ) for any engineering but i m going for مہندس مدني (civil). Pls try to post exam Past Papers of SQA Higher Physics, Eng, Math. formula sheets equal to As or A-Level , i don't know sub-codes of as or A-Level

Regards,

Smith,
Dubai

 

[Kumkum]

View attachment 22864


can any one solve (i) please it would be great help!

Thank you!

hope it helps

 

[snowbrood]

It is, the A is a speed time graph, the speed fluctuates between t1 and t2 and then comes back to the same horizontal axis so the speed is same.

maybe the book is wrong