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  1. salvatore

    Mathematics: Post your doubts here!

    http://papers.xtremepapers.com/CIE/...S Level/Mathematics (9709)/9709_w13_qp_33.pdf Please please plaseee help me with qn 6(ii) I'm freaking out :(
  2. salvatore

    Vector discussion...

    http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Mathematics%20%289709%29/9709_w13_qp_33.pdf Please please plaseee help me with qn 6(ii) I'm freaking out :(
  3. salvatore

    Mathematics: Post your doubts here!

    Thank you for your reply. The marking scheme got the value of C as 3 (I got 6). They also got the value of K as 0.4 (I got 0.4). You must've noticed that I got half their values.. so I've messed up in one tiny bit of the question. I'll appreciate if you could take a closer look at my solution
  4. salvatore

    Mathematics: Post your doubts here!

    http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Mathematics%20%289709%29/9709_w10_qp_33.pdf qn 9(ii), I've shown my attempt working below. Could someone please tell me where I've gone wrong? I'll be grateful.. dA/dt = k√(2A - 5) dt/dA = 1 / k√(2A - 5) k dt =...
  5. salvatore

    PHYSICS p41 GT

    Oh yeah, and that! Especially the hall probe ones.. How did you find the paper overall?
  6. salvatore

    Physics: Post your doubts here!

    How was paper 41 guys? I found it okayish
  7. salvatore

    PHYSICS p41 GT

    In reality, most of the questions were quite straightforward. Though, I feel I have messed up quite a lot. Let's hope the threshold is low
  8. salvatore

    Physics: Post your doubts here!

    http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Physics%20%289702%29/9702_s08_qp_4.pdf qn no. 6(b).. for part i, why is the distance 2.8cm? Shouldn't it be 4.5cm? I'll be really grateful for a prompt response
  9. salvatore

    Physics: Post your doubts here!

    How did you get 1.25 and 0.125? Sorry for bothering :/
  10. salvatore

    Mathematics: Post your doubts here!

    http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Mathematics%20%289709%29/9709_s13_qp_31.pdf Pleaseee help me with qn no. 6(ii), I'll be grateful! Thanks
  11. salvatore

    Physics: Post your doubts here!

    http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Physics%20(9702)/9702_w07_qp_4.pdf Qn no. 5(b)ii.. Could someone please explain why 1cm^2 represents 156 microC?
  12. salvatore

    Physics: Post your doubts here!

    So why don't we consider the Ke while calculating the total energy?
  13. salvatore

    Physics: Post your doubts here!

    http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Physics%20%289702%29/9702_w13_qp_42.pdf Please help me with qn no. 3(b)ii.. how do you calculate the total energy? Thanks
  14. salvatore

    Mathematics: Post your doubts here!

    If 1+2i is a root, that means substituting this into the equation will give you 0. (1+2i)^3 - a(1+2i) +10 The best way to solve (1+2i)^3 is to square it first, then multiply by (1+2i). (1+2i)^2 = (1)^2 + 4i + (2i)^2 i^2 = -1 => 4i - 3 (4i-3)(1+2i) = 4i + 8(i)^2 - 3 - 6i again, i^2 = -1 => -11...
  15. salvatore

    Chemistry P 41 HERE WE GO!!!!

    What a relief! I thought I was wrong. Oh that sucks, but don't worry.. you'll hopefully do well in the other questions :)
  16. salvatore

    Chemistry P 41 HERE WE GO!!!!

    Is it just me, or you guys also got ALL the stereoisomers asked in the paper as cis-trans?
  17. salvatore

    Mathematics: Post your doubts here!

    I'm just gonna explain the whole part.. For this part, we have: u = 0 (initial velocity) s = 0.6 m v = ? (thats what we're looking for) a = 5.846 (from part i) lets use the equation v^2 = v^2 + 2as v^2 = 0 + (2 x 5 x 0.6) v = 2.65 m/s For A: There is no force acting on it, so forward force =...
  18. salvatore

    Mathematics: Post your doubts here!

    http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Mathematics (9709)/9709_s12_qp_42.pdf Pleaseee help me with qn no. 7(i). From the marking scheme, why is K.E = 0.5 x Vapproach - Vreturn? Change in K.e is usually (final speed - initial speed), so why have they done the...
  19. salvatore

    Mathematics: Post your doubts here!

    Thank you so much :)
  20. salvatore

    Mathematics: Post your doubts here!

    http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Mathematics%20%289709%29/9709_w09_qp_32.pdf Please help me with question 8(ii). I'm etting the wrong answer despite trying several times. I'll be grateful for your help
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