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Physics: Post your doubts here!

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http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_s11_qp_21.pdf
Q1 b(ii)
please solve, showing the calculations
I tried it several times but my answer repeatedly came the same incorrect value
Have you changed the units to m for the diameters and length?
Btw its my way:
R=p*l/A
7.5=p*(1750/1000)/(phi*(0.5*0.38*10^-3)^2)
7.5*phi*(0.5*0.38*10^-3)^2=1.75p
p=7.5*phi*(0.5*0.38*10^-3)^2/1.75
p=4.8604*10^-7 ohm m.-->4.86*10^-7 ohm m

Hope this helps! :D
 
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Did these definitions allright for applications (paper 4) ?

Tuning circuit : It regenerates the signal before trasnmiting it to the R.F amplifier.
Switch : It turn on and off the aerial
 
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Did these definitions allright for applications (paper 4) ?

Tuning circuit : It regenerates the signal before trasnmiting it to the R.F amplifier.
Switch : It turn on and off the aerial
switch-it enables the aerial for transmission and receipt of signal
tuning circuit-it fixes the carrier frequency
 
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Have you changed the units to m for the diameters and length?
Btw its my way:
R=p*l/A
7.5=p*(1750/1000)/(phi*(0.5*0.38*10^-3)^2)
7.5*phi*(0.5*0.38*10^-3)^2=1.75p
p=7.5*phi*(0.5*0.38*10^-3)^2/1.75
p=4.8604*10^-7 ohm m.-->4.86*10^-7 ohm m

Hope this helps! :D
sir, the next part of the question
what yu solved is b (i)
i am askin fr b (ii)
thanks in advance :)
 
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Need help on paper 1 S06 Q33. find the pd between X and Y

I dont really understand where is "between P and Q". it could be anywhere on the circuit or connect a new wire between P and Q.

Please help.
 
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force and motion

one horse pulls,with a force of X N , a cart of a mass 800 kg along a horizontal road at constant speed. three horses pulling each with a force of X N , give the cart an acceleration of 0.8m/s^2 . find the time it will take two horses to increase the speed of the cart from 2m/s to 5 m/s , given that each horse pulls with a force of X N, and that the resistance to the motion has the same constant value at all time.
 
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Need worked solutions for AS Physics past year papers. If possible, recent years please eg 2014,2013,2012 and so on. Suggest any links please thanks :)
 
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Physicist I know that you have the solved question for Oct Nov 2005 paper 2 on your blog...but may you please SHOW me the graph of question 8 b (ii) ?
 
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