Physics: Post your doubts here!

[usama321]

the potential on the first wire is 5/15 * 2 = 2/3 V
potential in the second wire is 10/15 * 2= 4/3 V
their difference is 2/3 V
which is potential difference.
i know why you are confused.
the place where the wire is joining is actually where there is a little dot. that is junction. where the wire pass straight through it is not a junction.
this might help

Actually Suchal, the potential at the terminal in the first wire is 10/15 *2. Had there been resistors of different resistances, you would have gotten the wrong answer. At the terminal in the second wire, it would be 5/15 *2. Your answer gives a negative value, which is not same as the positive value anyway

 

[Suchal Riaz]

Actually Suchal, the potential at the terminal in the first wire is 10/15 *2. Had there been resistors of different resistances, you would have gotten the wrong answer. At the terminal in the second wire, it would be 5/15 *2. Your answer gives a negative value, which is not same as the positive value anyway

The wire which you called wire one, i called it wire two. Oversmart usama.

 

[Suchal Riaz]

y did u take height for column q as x and not 2x?

i took pressure of the orange mark. so height will be 2x and x respectively of p and q. if we would have taken the pressure of bottom point then it would have become more complicated.

 

[chocolate_girl]

i took pressure of the orange mark. so height will be 2x and x respectively of p and q. if we would have taken the pressure of bottom point then it would have become more complicated.
View attachment 39874

Ok thanks

 

[Suchal Riaz]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_w05_qp_1.pdf

Mcq 11
Y is the ans B wen both forces should be giving resultant?
Suchal Riaz

what do you mean by two forces? there is only one force: weight.
so the only force, weight, acts vertically. so A is the answer. not B.

 

[usama321]

The wire which you called wire one, i called it wire two. Oversmart usama.

Lol kk. My mistake. But you don't have to be a complete jerk -_-

 

[usama321]

Though i do wonder sometimes whether your conscience ever makes you feel guilty :3

 

[Suchal Riaz]

Lol kk. My mistake. But you don't have to be a complete jerk -_-

Though i do wonder sometimes whether your conscience ever makes you feel guilty :3

if you want me to be like a stranger and behave like "aap ka bara shukriya" then it's I'll it.
I was just talking to you like I talk to friends. informally. if you feel that is being jerk then OK. I sincerely apologise for my heinous attitude.

 

[Tulaib]

Q: 3(b) (i)
Somebody help
http://papers.xtremepapers.com/CIE/...and AS Level/Physics (9702)/9702_w07_qp_2.pdf

 

[usama321]

if you want me to be like a stranger and behave like "aap ka bara shukriya" then it's I'll it.
I was just talking to you like I talk to friends. informally. if you feel that is being jerk then OK. I sincerely apologise for my heinous attitude.

Did i say anything to you when you talked to me informally on my wall? Of course not, but there is a difference between the two things. I mean you might not notice it, but sometimes you belittle others by your posts. You are intelligent, but ask around, and many people will tell this to you that in study related matters, you are arrogant. Maybe a little humility?

 

[Suchal Riaz]

Did i say anything to you when you talked to me informally on my wall? Of course not, but there is a difference between the two things. I mean you might not notice it, but sometimes you belittle others by your posts. You are intelligent, but ask around, and many people will tell this to you that in study related matters, you are arrogant. Maybe a little humility?

All I have to say regarding your resentful remarks is that I meant to hilariously scoff; I didn't mean to belittle anyone.
I again apologise. I am never recalcitrant in admitting my mistakes.

 

[Suchal Riaz]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_s07_qp_2.pdf
Q 5 part c and d

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_w07_qp_2.pdf
Q2
Q5 part a

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_s08_qp_2.pdf
Q2 part b2
Q4 part b
Q5 part c
Q6 part b

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_w08_qp_2.pdf
Q3 part b
Q7 part b2

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_s10_qp_22.pdf
Q4 part c
Q5 part a 2

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_w10_qp_22.pdf
Q4partb 2
Q6

http://papers.xtremepapers.com/CIE/...nd AS Level/Physics (9702)/9702_w10_qp_21.pdf
Q3 part c

http://maxpapers.com/wp-content/uploads/2012/11/9702_s13_qp_22.pdf
Q5 partc

I know its Aaaa lot but i really need help
Thank you


Some body please help

w07/2
Q5(c)As stationary wave doesn't travel, the speed calculated is speed of the incident and reflected waves. these two waves superimpose/interfere to create the stationary wave
(d) there is no d part of this question

Q2 (a) electric field strength is the strength of electric field. it can be measured by putting a +ve charge in the field and determine the force it experiences. it is a vector quantity. its formal definition will be "force per unit positive charge in an electric field"

Q(5)(a)
in a transverse wave the particles of medium(like water molecules in water waves) travel perpendicular to the direction in which the energy propagates.
in polarisation we restrict the direction of oscillation of particles in one only one direction which is perpendicular to the direction of propagation of energy.
remind me rest of them tomorrow i am having a severe headache now.

 

[chocolate_girl]

what do you mean by two forces? there is only one force: weight.
so the only force, weight, acts vertically. so A is the answer. not B.

So there is x component due to velocity only? As there will b no acceleration hence no force?

 

[Suchal Riaz]

So there is x component due to velocity only? As there will b no acceleration hence no force?

exactly

 

[Suchal Riaz]

Tulaib

 

[Champ101]

I'll be really grateful if someone explain this circuit stuff to me. Just the circuit. I mean how can you say whats's happening, its so complicated.

 

[Betharie Cendera A]

Asw. My name is Betharie. Does anyone have physics revision based on As Level May/June 2014 physics syllabus? Thank you. Wasw

 

[Malik777]

 

[kitkat <3 :P]

P=W/t or E/T so E=PT => 70*(5*60) => 21000J
for specific latent heat of vapourisation we divide latents heat of vapourisation (i.e. the energy calculated )by mass so
Lf/m= 21000/13.6 = 1544.12 jg^-1
i can be wrong please confirm it

 

[Mashal zeb]

Can somebody kindly explain nd solve b nd c part