Physics: Post your doubts here!

[ashiqbal]

and here are complete and precise BIOLOGY NOTES that contain ATP procedures as well
http://www.mediafire.com/download.php?fd5s1c9s6z6a8n3

 

[Sana101]

PAPER 1 OCT/NOV 2010 /11
I need help with Q)13,18,19,24,33,34
http://www.xtremepapers.com/CIE/International A And AS Level/9702 - Physics/9702_w10_qp_11.pdf

 

[rideronthestorm]

the concept behind it too

 

[ABDSyed]

http://www.xtremepapers.com/CIE/International A And AS Level/9702 - Physics/9702_w10_qp_51.pdf
Any one on how to get Uncertaintiy Q2b

 

[Hook]

Need help with M/J 09 Physics A2 Paper 4 Question 6 part c
How come in the marking scheme the current used to find out max current is 2.3A rather than 2.6A specified as I(r.m.s).

Question Paper
http://www.xtremepapers.com/CIE/International A And AS Level/9702 - Physics/9702_s09_qp_4.pdf

Mark Scheme
http://www.xtremepapers.com/CIE/International A And AS Level/9702 - Physics/9702_s09_ms_4.pdf

 

[confused123]

the concept behind it too View attachment 6341

this gradient shows us conductance. so d might be the right option as it shows higest conductance i.e lowest resistance.
what is the answer in marking scheme?

 

[confused123]

PAPER 1 OCT/NOV 2010 /11
I need help with Q)13,18,19,24,33,34
http://www.xtremepapers.com/CIE/International A And AS Level/9702 - Physics/9702_w10_qp_11.pdf

u r asking same questions again and again. i have already answered these. type the confusion in the respective mcq.

18th : Power = F into V , F = ma , so m1g-m2g will give you the tension in the string. multiply it with v, u will get the power. D is the right option.

19) Pressure = p g h , 1020 into 10 into 10,000m = 102000000 = 10^8 Pa D option!

i don't know 24!

don't know 33

34: done on previous pages here

 

[umarashraf]

waooo...:

 

[confused123]

waooo...:

what's dre to waoo about?

 

[umarashraf]

nothing special mate....

 

[confused123]

Guyz can ne1 help me with these Q
http://www.xtremepapers.com/CIE/International A And AS Level/9702 - Physics/9702_s10_qp_11.pdf Q no 27, 29

27) its zero because the distance moved by the unit positive charge is not in the direction of the force applied. the force here is towards the centre. centripetal force. what say?

29)direction of field is INTO the paper. u need to make 3D view in your mind. its coming out of the paper from positive to negative. when electron beam travels from left to right, it will come out of the paper into the observer eyes.

 

[NokiaN95638]

27) its zero because the distance moved by the unit positive charge is not in the direction of the force applied. the force here is towards the centre. centripetal force. what say?

29)direction of field is INTO the paper. u need to make 3D view in your mind. its coming out of the paper from positive to negative. when electron beam travels from left to right, it will come out of the paper into the observer eyes.

Thnks Mate.

 

[Scafalon40]

http://www.xtremepapers.com/CIE/International A And AS Level/9702 - Physics/9702_s09_qp_02.pdf
Q.2 part b(i)
isn't the change in momentum suppose to be mv-mu?
I can't solve part b(i), please help!
My answer comes out to be -57.6, its supposed to be +57.6

 

[confused123]

Thnks Mate.

your welcome

 

[confused123]

http://www.xtremepapers.com/CIE/International A And AS Level/9702 - Physics/9702_s09_qp_02.pdf
Q.2 part b(i)
isn't the change in momentum suppose to be mv-mu?
I can't solve part b(i), please help!
My answer comes out to be -57.6, its supposed to be +57.6

man the answer is -5.76 !!!

very simple: mv-mu = change in momentum. 1.2 ( -0.8 - 4 ) = -5.76 kg m/s , u shud notice the time of collision. the initial velocity being 4 m/s and final being -0.8 .

 

[hmlahori]

have some doubts in paper 1 m/j 05 q14, o/n 05 q5,7,16, o/n 09 q9,14,28, m/j 10(P11) q22,26,27, o/n 10(P11) q18,24,37, m/j 11(P11) q15,34

 

[confused123]

have some doubts in paper 1 m/j 05 q14, o/n 05 q5,7,16, o/n 09 q9,14,28, m/j 10(P11) q22,26,27, o/n 10(P11) q18,24,37, m/j 11(P11) q15,34

this is so messy. can u please upload the links and write clearly. thanks

 

[hmlahori]

this is so messy. can u please upload the links and write clearly. thanks

Sure, here..........

http://www.xtremepapers.com/CIE/International A And AS Level/9702 - Physics/9702_s05_qp_1.pdf Q14

http://www.xtremepapers.com/CIE/International A And AS Level/9702 - Physics/9702_w05_qp_1.pdf Q5,7,16

http://www.xtremepapers.com/CIE/International A And AS Level/9702 - Physics/9702_w09_qp_11.pdf Q9,14,28

http://www.xtremepapers.com/CIE/International A And AS Level/9702 - Physics/9702_s10_qp_11.pdf Q22.26,27

http://www.xtremepapers.com/CIE/International A And AS Level/9702 - Physics/9702_w10_qp_11.pdf Q18,24,37

http://www.xtremepapers.com/CIE/International A And AS Level/9702 - Physics/9702_s11_qp_11.pdf Q15,34

 

[rideronthestorm]

the answer is c .. dont know how ...conductance ? :s

 

[Scafalon40]

man the answer is -5.76 !!!

very simple: mv-mu = change in momentum. 1.2 ( -0.8 - 4 ) = -5.76 kg m/s , u shud notice the time of collision. the initial velocity being 4 m/s and final being -0.8 .

But the marking scheme states it to be +57.6
Also it states the working to be 1.2(4+0.8)
Here:http://www.xtremepapers.com/CIE/International A And AS Level/9702 - Physics/9702_s09_ms_2.pdf