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  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

    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?
  9. B

    Help in chem

    Explain the question in the picture.
  10. B

    Chemistry help

    Please explain how to solve MCQ# 16 in this paper: http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Chemistry%20(9701)/9701_s11_qp_11.pdf
  11. B

    Physics help

    Please solve the question in the attachment and also explain it.
  12. B

    bromoethane

    Bromoethane can be prepared from ethane by the substitution of hydrogen by bromine. What are the two main problems with using this method?
  13. B

    Bromoethane

    Bromoethane can be prepared from ethane by the substitution of hydrogen by bromine. What are the two main problems with using this method?
  14. B

    Aluminium compounds

    Although aluminium is a metal, it forms covalent compounds. However I discovered that Al2O3 and AlF3 are ionic compounds. Why is this so and are there any other aluminium compounds that are ionic?
  15. B

    Chemistry help!

    Plz answer this question: ?The relative atomic mass of an element is the weighted average atomic mass of the element relative to 1/12th the mass of an atom of the 12C isotope. What doe the word 'weighted' mean in the definition?
  16. B

    Rechecking of paper

    What is the last date of applying for rechecking of the papers? And what is the procedure of having it done?
  17. B

    how to unfollow a thread?

    how do we unfollow a thread we have posted in?
  18. B

    Best faculty?

    Which school/college has the best faculty for A levels in lahore?
  19. B

    help in bio

    http://www.xtremepapers.com/papers/CIE/Cambridge%20International%20O%20Level/Biology%20(5090)/5090_w10_qp_62.pdf in Q2 in the diagram, where is the radicle and the plumule?
  20. B

    Fav. teacher from GHA??

    Who is it?? and why?
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