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  1. S

    Physics: Post your doubts here!

    Thank you sooo much !!
  2. S

    Physics: Post your doubts here!

    but But why are we subtracting like 1/R,why not just directly R+h1 - R+h2? sorry for trouble!
  3. S

    Physics: Post your doubts here!

    i did this actually ,can u show me steps please..?
  4. S

    Chemistry: Post your doubts here!

    http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Chemistry%20(9701)/9701_s03_qp_4.pdf please explain Q2 part b
  5. S

    Physics: Post your doubts here!

    http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Physics%20(9702)/9702_w06_qp_4.pdf please explain Q4 part B....i m getting answer as 6 x 10^22 but its 6 x 10^24..
  6. S

    what As chapters do come in A2?

    Jazak Allah Rahma:)
  7. S

    what As chapters do come in A2?

    Assalamoalaikum,dear friends.. I have heard tht when u do A2 ,u should keep in touch with As chapters too.... so please anyone can anyone guide me,that what are those chapters of As ?in bio,chem and physics. would be very thnkful!
  8. S

    Physics: Post your doubts here!

    http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Physics%20(9702)/9702_s05_qp_1.pdf please explain Q16 and 29
  9. S

    Physics: Post your doubts here!

    here u have to assume a value of p.d=eg:6 V so current in circuit =power/voltage=2 amp nw voltage across P would be 4V and across Q and R would be 2V since they are in parallel see hw itS 2V(ASSUMING EACH RESISTANCE TO BE 3,SO TOTAL R OF RESISTORS IN PARALLEL=1.5 OHM NW THERE SHARE OFBATTERYS...
  10. S

    Physics: Post your doubts here!

  11. S

    Physics: Post your doubts here!

    Thank you so much:)
  12. S

    Physics: Post your doubts here!

    http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Physics%20(9702)/9702_w11_qp_11.pdf please explain Q32,23,20. I will be very thankful
  13. S

    Chemistry: Post your doubts here!

    Q2 first find mass of nitrogen in 14g of fertilizer by 15/100 x 14=2.1g then find mole=2.1/14(Mr or nitrogen)=0.15mol then since con=mol/vol=0.15/5=0.03mol/dm3 Q27 all of them wud have had molecular formula C10H14O so nw read second statement that its unreactive towards mild oxidizing...
  14. S

    A level Biology: Post your doubts here!

    Jazak Allah Khairan!
  15. S

    Chemistry: Post your doubts here!

    http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Chemistry%20(9701)/9701_w10_qp_12.pdf please explain Q3,7,8,27,34,38. thanks in advance!
  16. S

    A level Biology: Post your doubts here!

    http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Biology%20(9700)/9700_s06_qp_1.pdf please explain Q24.
  17. S

    A level Biology: Post your doubts here!

    Q10 if pigment is able to escape,that means phospholipid is broken down and that's only possible if solution is ethanol,where as protein channels are also broken down,cuz HCl denatures the protein 3D shape,.....hence no barrier for the pigment and its able to escape. Q14 inhibition is...
  18. S

    Physics: Post your doubts here!

    http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Physics%20(9702)/9702_s10_qp_11.pdf plz explain Q16. http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Physics%20(9702)/9702_s11_qp_11.pdf plz explain Q13...
  19. S

    Physics: Post your doubts here!

    Q14 Pivot is taken as the end of trailor and then since resultant moment =0,y is taken as the force we need to find anticlockwise=clockwise y x 20m=30000N x 20 so y(force)=15000N Q15 not able to understand Q itself Q32 I=Q/t=8/20,so I=0.4Ampere now V=IR=0.4 x 30=12Volts Q38 find total...
  20. S

    Physics: Post your doubts here!

    Q23 first find frequency of wave using f=speed/wavelength that is = 6.25Hz then find speed of particle P=2 x 2(amplitude)x pi x 6.25 then use formula of kinetic energy to find max K.E that will be 0.00404J=4.04mJ Q6 obviously if we apply force perpendicular to the direction of motion,the...
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