Physics: Post your doubts here!

[snowbrood]

can someone please help me with this question, the answer is B by the way

u dont need to know useless formulas u might know that mass=volume*density
we need to find the volume of the wall
volume=area*distance
distance=velocity*time
mass=2000*10*t*1.3
F=MV/T
F =(2000*10*t*1.3*10)/t=260kN
P=fv =260*10=2600K
since conversion is 50% 2600/2=1300K

 

[adibshamsuddin]

How do I solve question C? Between A and B field strength is 2kv/0.25=8kv. Now for C and D is it also the same. I mean is electric field strength same at all points (whatever their position is) in an uniform field?? I know I sound like a dumbo but doesn't electric field strength decrease with increasing d. Here C is at the midpoint of A and B and D is at midpoint of C and B, so how is it possible?

 

[Jaspreet Dhaliwal]

u dont need to know useless formulas u might know that mass=volume*density
we need to find the volume of the wall
volume=area*distance
distance=velocity*time
mass=2000*10*t*1.3
F=MV/T
F =(2000*10*t*1.3*10)/t=260kN
P=fv =260*10=2600K
since conversion is 50% 2600/2=1300K

that wasnt the answer sorry hahah

 

[Jinosupreme]

How do I solve question C? Between A and B field strength is 2kv/0.25=8kv. Now for C and D is it also the same. I mean is electric field strength same at all points (whatever their position is) in an uniform field?? I know I sound like a dumbo but doesn't electric field strength decrease with increasing d. Here C is at the midpoint of A and B and D is at midpoint of C and B, so how is it possible?

Yes, the electric field strength is constant at any point. The thing that change is the voltage across, acceleration of the particles/sub-particles , they will be different at different position, but NOT the electric field strength

 

[Jinosupreme]

http://papers.xtremepapers.com/CIE/...d AS Level/Chemistry (9701)/9701_s03_qp_1.pdf

Guys I need help :0,
Q40 m what is K-capture??

 

[Jinosupreme]

http://papers.xtremepapers.com/CIE/...and AS Level/Physics (9702)/9702_s04_qp_1.pdf

Need help in question 14, 25, 26
14B
25A
26B

Thanks a lot!!!

 

[snowbrood]

u dont need to know useless formulas u might know that mass=volume*density
we need to find the volume of the wall
volume=area*distance
distance=velocity*time
mass=2000*10*t*1.3
F=MV/T
F =(2000*10*t*1.3*10)/t=260kN
P=fv =260*10=2600K
since conversion is 50% 2600/2=1300K

edit
p=E/T=0.5*mv^2/t=0.5*(2000*10*t*1.3810)*10^2/t=1300k
since conversion is 50% so 650K Watts i dont get why the first method didnt work i will consult my teacher

 

[snowbrood]

edit
p=E/T=0.5*mv^2/t=0.5*(2000*10*t*1.3810)*10^2/t=1300k
since conversion is 50% so 650K Watts i dont get why the first method didnt work i will consult my teacher

that wasnt the answer sorry hahah

oh yes i found my mistake we will have to find average force that is we divide 260 by 2. i falsely assumed that final velocity of wind will be zero my bad

 

[farhan141]

Anyone please tell me which books are best for physics and why they are best.

Yo bro. I heard Pacific A Level Physics Vol 1 and 2 (Poh) and Physics A-Level (David Sang, Graham Jones) are good for now.

For Chemistry I got the Chemistry AS and A Level Coursebook by Roger Norris.

 

[Navjot Singh]

Hey Guys
i have a doubt ...
9702_s05_qp_1 ..
question 20 .
I need help ASAP

 

[Navjot Singh]

Hey Guys
i have a doubt ...
9702_s05_qp_1 ..
question 20 .
I need help ASAP

 

[adibshamsuddin]

I have a question about polarization. My question is if the Polaroid is aligned vertically will vertically polarized light will pass through or horizontally polarized light will pass through? vertically aligned means it will stop vertically polarized light or does it mean it will stop all other polarized lights and allow vertically polarized light to pass through..real confused here

 

[KZW]

I have a question about polarization. My question is if the Polaroid is aligned vertically will vertically polarized light will pass through or horizontally polarized light will pass through? vertically aligned means it will stop vertically polarized light or does it mean it will stop all other polarized lights and allow vertically polarized light to pass through..real confused here

It will stop vertically polarized light.

 

[Jaspreet Dhaliwal]

GUYS GOT MOCKS TOMMOROW HELP PLEAAASE!!
http://olevel.sourceforge.net/papers/9702/9702_s13_qp_12.pdf

QUESTION 9
QUESTION 14
QUESTION 17
QUESTION 23
QUESTION 24
QUESTION 27
QUESTION 29
QUESTION 37

PLEASE HELP GUYS!

 

[Hemdon]

Hi guys, i am having doubt in paper 1 october november 2006 question no. 4 and 12, any help would be appreciated.

 

[hacker]

Asalam o alaikum
http://www.mediafire.com/?g65j51stacmy33c
This link is not working. please anyone can give another link to open A level physics Topical past papers ?

 

[adibshamsuddin]

how to solve questions where the circuit is shaped like a diamond ? you know the ones in which the circuit looks a diamond shape from outside ? anyone alive out there?

 

[Lashan Ali]

can anybody give me the password for the rar file downloaded from alevelform.com

 

[bubbles1997]

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)

Aoa. I had just started my As Level a week ago. I can easily understand Biology and very little difficulties in chemistry but I am a failure in Physics. Although I got B yet cannot understand physics.... I cant solve questions from book PACIFIC Physics A Level. I am stuck on chapter 4 (Static Equilibrium). What should I do... please help needed... :'(

 

[bubbles1997]

I need tips to be good at Physics.... in As level...