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  1. danial 234

    Biology; Chemistry; Physics: Post your doubts here!

    yes his grade was changed frm A to A*. they even sent the money back.
  2. danial 234

    Biology; Chemistry; Physics: Post your doubts here!

    he had rechecked his papers. after rechecking they send the answer booklet , mark sheet, q paper, and examiner report for that particular student's paper
  3. danial 234

    Maths, Addmaths and Statistics: Post your doubts here!

    b) these two have a common height then area ratio =0.5*h*2/0.5*h*5=2/5
  4. danial 234

    Maths, Addmaths and Statistics: Post your doubts here!

    a )these two triangles are similar. X is a common angle. XAB =XCD. XBA=XDC. (alt angles.) so ratio of area will be (2/5)^2
  5. danial 234

    Biology; Chemistry; Physics: Post your doubts here!

    they are positively charged. as like charges repel so a huge amount of energy is needed
  6. danial 234

    Maths, Addmaths and Statistics: Post your doubts here!

    midpoint is used in frequency polygon or cumulative frequency polygon
  7. danial 234

    Biology; Chemistry; Physics: Post your doubts here!

    one of friend had his islamiat paper rechecked of 2012. he had almost 75 marks yet he had an A*
  8. danial 234

    Maths, Addmaths and Statistics: Post your doubts here!

    underroot(12/3^3) underroot(12/9) underroot(4/3) 2/3
  9. danial 234

    Biology; Chemistry; Physics: Post your doubts here!

    It would be two curve waves.
  10. danial 234

    Maths, Addmaths and Statistics: Post your doubts here!

    But this JUST one mark can make the A* a distinction. Every mark matters
  11. danial 234

    Chemistry P1 and P2 today

    ans was 29.2
  12. danial 234

    Maths, Addmaths and Statistics: Post your doubts here!

    quadrants are quarter of a circle
  13. danial 234

    Biology; Chemistry; Physics: Post your doubts here!

    as the supply in primary coil is ac so current changes its direction. magnetic field also changes. this induces ac voltage in secondary coil. this phenomenon is called electromagnetic induction. the ac voltage depends upon number of turns
  14. danial 234

    Maths, Addmaths and Statistics: Post your doubts here!

    can anyone help me with q 9 b i a http://papers.xtremepapers.com/CIE/Cambridge%20International%20O%20Level/Mathematics%20D%20(Calculator%20Version)%20(4024)/4024_s10_qp_21.pdf
  15. danial 234

    Chemistry P1 and P2 today

    the question of kettle was about heat transfer through electrons
  16. danial 234

    Maths, Addmaths and Statistics: Post your doubts here!

    first, divide the square into quadrants, find area o quadrant 19.63. then divide the top right hand side oval shape into two. in this way quadrant would become a triangle and a half oval. then calculate area of triangle 12.5. subtract the area of tri from quad to get area of half oval. 7.13...
  17. danial 234

    When one door closes, another opens, but we often look so long at the closed door that we do...

    When one door closes, another opens, but we often look so long at the closed door that we do not see the one that has opened for us.
  18. danial 234

    Maths, Addmaths and Statistics: Post your doubts here!

    i it is better to follow this rule for examiner reports lay stress on this point and many good students have lost marks due to this. as for me i follow this rule and still have plenty of time to revise
  19. danial 234

    Maths, Addmaths and Statistics: Post your doubts here!

    this rule is clearly stated at the start of paper and examiner report
  20. danial 234

    Maths, Addmaths and Statistics: Post your doubts here!

    to everything except angles. the angles should be given till first dp
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