Physics: Post your doubts here!

[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

 

[Young Stunner]

Can anyone tell me if harmonics and fundamental mode of vibration is in the AS or not?

 

[talha-_-khan]

Can anyone tell me if harmonics and fundamental mode of vibration is in the AS or not?

fundamental modes of vibration are there but not SHM

 

[talha-_-khan]

SOME ONE PLEASE EXPLAIN

 

[abruzzi]

http://papers.xtremepapers.com/CIE/...and AS Level/Physics (9702)/9702_w07_qp_4.pdf
Could someone please explain 4(c)ii? I don't understand this at all!
Thanks

 

[sitooon]

Paper 5
http://papers.xtremepapers.com/CIE/...nd AS Level/Physics (9702)/9702_w12_qp_53.pdf
how to find error in first row of question 2 , i am getting 0.1 but marking scheme dont accept this answer and say dont allow

 

[Suchal Riaz]

the resistance will increase. to clear it out why. here is an example:

when resistance decrease current increase as V=IR and V is constant
the P.d around the bulb will be the same. current will be the same though each resistor(overall current will decrease, not in each parallel bulb)
P=IV. as I and V are same, power is same. so the brightness will be the same
another way to look at this question is like this: