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Recent content by bravegirl123

  1. B

    physics p1 help

    http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Physics%20(9702)/9702_s03_qp_1.pdf please explain q20
  2. B

    physics p1 help

    please expain q6 from this paper: http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Physics%20(9702)/9702_w03_qp_1.pdf
  3. B

    physics p4 help

    PLease explain Q5 part c in this paper: http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Physics%20(9702)/9702_s12_qp_42.pdf
  4. B

    Maths help complex numbers

    The variable complex number z is given by z = 2cosθ + i(1 − 2 sinθ). Prove that the real part of 1/(z + 2 − i) is constant for −π < θ < π. I simplified the answer to (1/4)((cosθ +isinθ)/(1+cosθ)). Marking scheme says that real part equals 1/4. I thought that whatever is not multiplied with i is...
  5. B

    Chemistry help

    Please can someone explain Q5's part 4 in the from the following paper: http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Chemistry%20(9701)/9701_w11_qp_43.pdf
  6. B

    LUMS SSE admission test

    Please can someone tell me the format of the SSE admission test. and also how to prepare for it.
  7. B

    how to find the pH when alkali is in excess?

    what is the final pH when 750 cc of 0.375M NaOH is mixed with 250 cc of 0.4M HCl?
  8. B

    Chemistry: Post your doubts here!

    Answer is C. If 2 can be correct, why not 1?
  9. B

    Chemistry: Post your doubts here!

    i dont get it
  10. B

    Chemistry: Post your doubts here!

    http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Chemistry%20(9701)/9701_w06_qp_1.pdf In Q5, isnt part D also showing a pi bond?
  11. B

    help

    but that is a catalysed rxn right?
  12. B

    Chemistry: Post your doubts here!

    Could u e could u please elaborate on that, i am still confused.
  13. B

    help

    doesnt sulphur burn in oxygen to form SO2?
  14. B

    Chemistry: Post your doubts here!

    The answer is C. Why cant the it be D?
  15. B

    help

    http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Chemistry%20(9701)/9701_w05_qp_1.pdf In question 12, my answer comes A which is wrong. How can the answer be D?
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