Physics: Post your doubts here!

[Mohammed salik]

Mohammed salik

Its oK .. But Why Negative Gradient?..
Why wont It come backk to Zero? Wont it be at rest?

 

[Haya Ahmed]

Q5bii) was a piece of a cake so here you go, Q2 needs a bit of thinking which I can't afford it. As I am doing comp
Hope it helps

View attachment 42435

OHH CRAP .. IT was 5 b (iii) !! *_* .. I thing you gonna kill me now

 

[Haya Ahmed]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_s13_qp_22.pdf

Q2 (b) i and ii
and
Q5 b (iii)


someone Help !
thanks !

 

[princeali97]

Haya Ahmed . Someone please correct me if im wrong anywhere.Thank you.Q2 The graphs.http://papers.xtremepapers.com/CIE/...nd AS Level/Physics (9702)/9702_s13_qp_22.pdf

 

[TheJDOG]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_s13_qp_22.pdf

Q2 (b) i and ii
and
Q5 b (ii)


Please someone Help ! thanks !

Hello there, for Q5 b(ii), if you look at the wave from P to Q, youll see that its 1.5Lambda, in part a)i), you already found Lambda, so subsititute youll get Length of PQ= 1.5 x 0.8= 1.2 m

 

[Mohammed salik]

Haya Ahmed . Someone please correct me if im wrong anywhere.Thank you.Q2 The graphs.http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_s13_qp_22.pdf

gR8. hOW ARE U SO gOOD aT gRAPHS..! AWESOME BHAI!!

 

[Haya Ahmed]

People It was 5 b(iii) I know 5B(ii) is EAAAAAAAAAAAAAAAAASY ... sowwy

 

[Thought blocker]

Haya Ahmed . Someone please correct me if im wrong anywhere.Thank you.Q2 The graphs.http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_s13_qp_22.pdf

Check that momentum graph again, I think there is some error, I cant figure it out.. coz meh mind is outta control due to computing... And the accn graph is same as I plotted it

 

[Thought blocker]

gR8. hOW ARE U SO gOOD aT gRAPHS..! AWESOME BHAI!!

Graph needs a fresh mind, if you have it you can plot it Simple.

 

[princeali97]

gR8. hOW ARE U SO gOOD aT gRAPHS..! AWESOME BHAI!!

Because i've faced these before and practiced them .

 

[Haya Ahmed]

Check that momentum graph again, I think there is some error, I cant figure it out.. coz meh mind is outta control due to computing... And the accn graph is same as I plotted it

Just 3 golden minutes PLEASE ! xD

 

[princeali97]

Check that momentum graph again, I think there is some error, I cant figure it out.. coz meh mind is outta control due to computing... And the accn graph is same as I plotted it

Umm..I dont find any.I think its okay.U tel.?

 

[Haya Ahmed]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_s13_qp_22.pdf

Q2 (b) ii

Q5 b (iii)

Any Genius can help me here please !
I can't sleep without solving these 2 question they are paining in my head ! X) OOOOH GOOOD

Thought blocker gotta use the word yaar now ! .. do some magic ! ... I'm sowy If this is disturbing you from computer ! X)

 

[princeali97]

Smart Question
Beta has Range of Energies and it also Has high speed and Would be Deflected by Electrons in Orbitals? How many marks for This question?

I didnt give the link for this one .And by the way m.s REJECTS high speed sorry .
β-particles have a range of energies
β-particles deviated by (orbital) electrons
β-particle has (very) small mass
(any two sensible suggestions, 1 each, max 2) B2 [2]
Do not allow β-particles have negative charge or β-particles have high speed [2] marks

 

[Thought blocker]

Umm..I dont find any.I think its okay.U tel.?

Umm umm I cant make out! it must be correct

Just 3 golden minutes PLEASE ! xD

The time period of the stationary wave is 20ms. After 5 ms, it would be a straight horizontal line, drawn on the dotted line. Take a look at this animation and you will understand the logic

usama321

 

[_Ahmad]

http://papers.xtremepapers.com/CIE/...nd AS Level/Physics (9702)/9702_s11_qp_22.pdf

need help!!!
Q2 ii) 2.

 

[Suchal Riaz]

I would start answering physics queries from tomorrow after i am done with my own revision so i don't misguide other people.

 

[Haya Ahmed]

Umm umm I cant make out! it must be correct

The time period of the stationary wave is 20ms. After 5 ms, it would be a straight horizontal line, drawn on the dotted line. Take a look at this animation and you will understand the logic

usama321

okay and now from where and how you got 20ms and what is meant by 5ms is 1/4 of the cycle I didn't get it HOW !

 

[Suchal Riaz]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_s11_qp_22.pdf

need help!!!
Q2 ii) 2.

friction=6π × 6.6 × 10–4 × 1.5 × 10–3 × 3.7=6.9 × 10-5
resultant force = mass * acceleration = weight-friction
ma=9.81-6.9× 10-5

mass = rho * volume = 1.5 × 10-5

a=(9.81-6.9× 10-5)/1.5 × 10-5
=4.93 m/s²

 

[Thought blocker]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_s11_qp_22.pdf

need help!!!
Q2 ii) 2.

the question says that the radius of the second raindrop is less than the first.
and F=6pi*D*R*v
if the radius for the second is less the frictional force acting on it is also less.
and Density=m/v
both the rain drops have the same density but the mass if the second is approx one-cube of that of the first bcoz the radius is less.

the difference in mass is much greater than the difference in frictional force. so, when if the equation
mg-f=ma
the acceleration of the second will be less than the first. so the slope of the second graph will be below that of the first. and as the mass of the second drop is less the weight (downward force) will b less and it will reach terminal velocity earlier than the first. so the graph will reach a lower constant value earlier.