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  1. Haris Bin Zahid

    Further Mathematics: Post your doubts here!

  2. Haris Bin Zahid

    Regarding Computer Science exam..

    I'm also one of those "fools" who opted for A Level CompSci despite having an A grade in AS Computing (because of the exciting programming part of the new course :p). So I will appreciate if anyone can provide me some worthwhile advice. Last year, I was the only one in my school who chose...
  3. Haris Bin Zahid

    Ok...thanks.

    Ok...thanks.
  4. Haris Bin Zahid

    So how was chemistry P12 today?

    I think that the level of difficulty was comparable to that of previous years. Neither too hard nor too easy.
  5. Haris Bin Zahid

    Yeah, that's obvious. In fact I wanted you to elaborate what does "the direction of change in...

    Yeah, that's obvious. In fact I wanted you to elaborate what does "the direction of change in momentum" imply?
  6. Haris Bin Zahid

    See Q11...

    See Q11: http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Physics%20(9702)/9702_w04_qp_1.pdf
  7. Haris Bin Zahid

    How do we determine the direction of change in momentum? Any idea?

    How do we determine the direction of change in momentum? Any idea?
  8. Haris Bin Zahid

    Computing 9691 Paper 1

    To fully understand what this function does, you need some basic knowledge about number theory (an extensive branch of mathematics). A recursive solution for calculating gcd (greatest common divisor) of two numbers is based on the concept of Euclidean Algorithm, which was stated (and proven) by...
  9. Haris Bin Zahid

    Difference between reading/writing in binary/text format

    I need someone to elaborate the difference between reading/writing to a file in binary and text format. CIE mark schemes show that the binary method is preferred. But what exactly is the difference between the two? I have scarce knowledge about this and only know that it is somewhat related to...
  10. Haris Bin Zahid

    Computers & ICT: Post your doubts here!

    Anyone who opted for python for Paper 2? If yes then please post the python implementation for this program: Q. Bike records are stored in a file SuperBikes. Write the code to read every bike record, count the number of bikes where service is due and output the result. You should assume that the...
  11. Haris Bin Zahid

    Chemistry: Post your doubts here!

    Which pair of reactions could have the same common intermediate? W CH3CH2CH3 → intermediate → (CH3)2CHCN X CH3CH(OH)CH3 → intermediate → (CH3)2C(OH)CN Y CH3CH=CH2 → intermediate → CH3CH(OH)CH3 Z CH3CO2CH2CH2CH3 → intermediate → CH3CH2CH2Br A W and X B W and Y C X and Z D Y and Z The answer is...
  12. Haris Bin Zahid

    Mathematics: Post your doubts here!

    (9-i) Let theta be denoted by "x". 4 cosx + 3 sinx = R cos (x-a) R = (4^2 + 3^2)^(1/2) = 5 a = arctan (3/4) = 0.6435 rad. (4 d.p.) Hence, 4 cosx + 3 sinx = 5 cos (x-0.6435) (ii) 5 cos (x-0.6435) = 2 0<x<2pi 0-0.6435<x-0.6435<2pi -0.6435 -0.6435<x-0.6435<5.6397 cos b = 2/5 (b is the basic...
  13. Haris Bin Zahid

    Mathematics: Post your doubts here!

    Please help me solve the 3rd part of the following question. I want an elaborate reply.
  14. Haris Bin Zahid

    Physics Coursebook

    Kindly upload the answers to end-of-chapter and exam-style questions for chapter 4 of the book A.S.A.P. Please.....you'd do me a great favour by doing so.:)
  15. Haris Bin Zahid

    Results: CIE May/June 2013 Examination Series

    By self study I meant no extra tuitions. Yeah. They have a reason to be.
  16. Haris Bin Zahid

    Results: CIE May/June 2013 Examination Series

    Islamabad. Self study.
  17. Haris Bin Zahid

    Results: CIE May/June 2013 Examination Series

    I have a little contribution. It's Allah who enabled me to achieve such a milestone.
  18. Haris Bin Zahid

    Results: CIE May/June 2013 Examination Series

    Nope. Statistics in Nov 2011. Pak. Studies and Isl in June 2012. And the rest in June 2013.
  19. Haris Bin Zahid

    Results: CIE May/June 2013 Examination Series

    My subjects were Maths D, Physics, Chemistry, Additional Mathematics, Computer Studies, English (Second Language), Urdu (Second Language), Pakistan Studies, Islamiyat and Statistics.
  20. Haris Bin Zahid

    Results: CIE May/June 2013 Examination Series

    Thank you very much.:)
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