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  1. amina1300

    Mathematics: Post your doubts here!

    https://drive.google.com/file/d/0B7SutyFkNVj5akFiYm84WFFoWTA/view?usp=drivesdk Solve this? x, y = ??
  2. amina1300

    Physics: Post your doubts here!

    Q4:T=1/f 1/50000 and divide this f by 2. This makes 1 complete wavelength in 2 divisions and hence you get C as the answer.
  3. amina1300

    Physics: Post your doubts here!

    opps i meant Q 15 I knew this one it quite obvious. Thanku fr helping me :) Can u try 9,37,15?
  4. amina1300

    Physics: Post your doubts here!

    http://papers.gceguide.com/A Levels/Physics (9702)/9702_w15_qp_13.pdf Q 37, 15 , 9
  5. amina1300

    Physics: Post your doubts here!

    This was confusing for me too. Absolute error or absolute incertainty is the uncertainty in a measurement, which is expressed using the relevant units, 0.5mm is the estimated error ( least count/2) so you should take 1mm.
  6. amina1300

    Physics: Post your doubts here!

    4 s.f
  7. amina1300

    Physics: Post your doubts here!

    http://papers.gceguide.com/A Levels/Physics (9702)/9702_w15_qp_13.pdf Q 37, 29,27,14
  8. amina1300

    Physics: Post your doubts here!

    If we take the coordinates from the top of the line and calculate gradient after ensuring units consistentency : 105 km/h into m/s by 105*1000/3600 -----》 grad = [ans/4] and we get D =7.3 rounded off to 2 s.f.
  9. amina1300

    Physics: Post your doubts here!

    mj2014 p13 q 37 38 :)
  10. amina1300

    Physics: Post your doubts here!

    Thankyou.
  11. amina1300

    Physics: Post your doubts here!

    The cross-section of an Olympic-size swimming pool filled with water. It is not drawn to scale. The density of the water is 1000kg m–3... Can someone explain how the answer is 3.4 KPa and not 3.5kPa. Q20 winter 2015 p12?
  12. amina1300

    CHEMISTRY PAPER 3 DOUBTSS!!

    FA6 was MnCl2 and FA7 was Al2(SO4)3 ???
  13. amina1300

    CHEMISTRY PAPER 3 DOUBTSS!!

    how did you guys calculate the percentage purity?? Why did I get it around 10 percent??
  14. amina1300

    CHEMISTRY PAPER 3 DOUBTSS!!

    I wrote FA7 but couldn't complete the whole paper
  15. amina1300

    CHEMISTRY PAPER 3 DOUBTSS!!

    Can someone tell me the amount of time I should spend on each question.
  16. amina1300

    CHEMISTRY PAPER 3 DOUBTSS!!

    Some say titration isnt coming doubt that but, who knows and something with organic chemistry DNPH or fehlings solutions but Im not sure :/
  17. amina1300

    CHEMISTRY PAPER 3 DOUBTSS!!

    why not Is this fine?
  18. amina1300

    CHEMISTRY PAPER 3 DOUBTSS!!

    Do we add the rough titre in the table ?
  19. amina1300

    CHEMISTRY PAPER 3 DOUBTSS!!

    I Realised that it was being used as a test for the presence of Iodine. ( color change to blue-black on addition of starch)
  20. amina1300

    CHEMISTRY PAPER 3 DOUBTSS!!

    Wow thats really helpful thankyouuuuuuuuuuu!!!!
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