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  1. A

    Physics: Post your doubts here!

  2. A

    Physics: Post your doubts here!

    which part
  3. A

    Physics: Post your doubts here!

  4. A

    Physics: Post your doubts here!

    can any one please explain question 2 (a) of this paper http://freeexampapers.com/A-Level/Physics/CIE/2003-Jun/9702_s03_qp_4.pdf
  5. A

    Chemistry: Post your doubts here!

    can anyone please explain Q2 (e) and (f) of this paper http://onlineexamhelp.com/wp-content/uploads/2015/02/9701_w14_qp_52.pdf
  6. A

    Chemistry: Post your doubts here!

    Can you please elaborate it and explain part (f) too
  7. A

    Chemistry: Post your doubts here!

    can anyone please explain Q2 (e) of this paper http://onlineexamhelp.com/wp-content/uploads/2015/02/9701_w14_qp_52.pdf
  8. A

    Mathematics: Post your doubts here!

    from i it can be seen that the values T1...T2....T3... follow arithmetic sequence with d =(1/4)π from formula sheet Tn=a+(n-1)d a=T1 , d =(1/4)π given, Tn > 25 a+(n-1)d > 25 0.362+(n-1)(1/4)π > 25 (1/4)πn-(1/4)π > 25-0.362 (1/4)πn > 25-0.362+(1/4)π n > (25-0.362+(1/4)π)/(1/4)π n > 32.37 n =33
  9. A

    Mathematics: Post your doubts here!

    z=9 e^i(1/3) z=9(e^0(cos(1/3)+i sin(1/3)) square root of z=(9 (e^0(cos(1/3)+i sin(1/3)) )^1/2 =9^(1/2)( cos(0.5*(1/3 π))+i sin(0.5*(1/3 π)) ) =+-3(cos(1/6 π) + i sin(1/6 π)) one square root is =3(cos(1/6 π) + i sin(1/6 π)) = (3√3/2)+i (3/2) (open the bracket) r=3 θ=1/6 π so 3 e^i (1/6)...
  10. A

    Mathematics: Post your doubts here!

    http://justpastpapers.com/9709_s14_ms_32/
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    Physics: Post your doubts here!

    For the first one Vin = Votage at the non inverting input - voltage at the inverting input gain=Vout/Vin open loop gain is usually very large almost around (x 10^5) if not not specified Votage at the non inverting input is constant at 1.0V (given) and the voltage at the inverting input is...
  12. A

    Physics: Post your doubts here!

    http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Physics%20(9702)/9702_s12_qp_12.pdf Q23
  13. A

    Physics: Post your doubts here!

    http://papers.xtremepapers.com/CIE/...nd AS Level/Physics (9702)/9702_s13_qp_11.pdf Q24
  14. A

    Physics: Post your doubts here!

    Thought blocker can you explain how to change I=power/area to I=A^2/S
  15. A

    Physics: Post your doubts here!

    yup got this THANKS aLOT the thing i didn't get is how we changed I=power/area to I=A^2/S Sorry for bothering you again
  16. A

    Physics: Post your doubts here!

    Can you please explain how you derived A^2/S PLEASE
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    Physics: Post your doubts here!

    since this is a parallel circuit so the emf across 4R will be same as emf across all three remaining resistors (R,2R,3R) lets say R=1 ohms since they have given the V across 2R we can find the current in the down branch of the circuit V=IR 2/2=I I=1 A now you can find the V across all the...
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    Physics: Post your doubts here!

    HELP!!!!!!!!! http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Physics%20(9702)/9702_s13_qp_11.pdf Q24,37
  19. A

    Physics: Post your doubts here!

    http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Physics%20(9702)/9702_w03_qp_1.pdf Q17,40 http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Physics%20(9702)/9702_w02_qp_1.pdf Q35
  20. A

    Physics: Post your doubts here!

    23 check this by Thought blocker https://www.xtremepapers.com/community/threads/physics-post-your-doubts-here.9860/page-568#post-828660
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