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  1. janasalem

    Physics Paper-21 !!

    can anyone post the electricity answers ?
  2. janasalem

    Physics Paper-21 !!

    how did you get the strain energy ? was the question change in strain energy ?
  3. janasalem

    Physics Paper-21 !!

    are you sure the distance is 10.4 ?
  4. janasalem

    How was M1 (Math P/42)? (No discussion)

    tension in last question ?
  5. janasalem

    A'level Mathematics Paper 42 (M1)

    tension in last question ?
  6. janasalem

    How was M1 (Math P/42)? (No discussion)

    last question was the mass added or replaced?
  7. janasalem

    Chemistry: Post your doubts here!

    During the electrolysis of molten aluminium oxide to produce aluminium, using carbon electrodes, two consecutive reactions occur at the anode, each producing a different gas. How does the oxidation number of oxygen change in these reactions? A decreases by 2, then increases by 2 B increases by...
  8. janasalem

    Physics: Post your doubts here!

    hi can someone please explain question 7 http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Physics%20(9702)/9702_w05_qp_2.pdf what does the voltmeter measure and how does it show 0 reading ?
  9. janasalem

    Chemistry: Post your doubts here!

    Can anyone help ?
  10. janasalem

    Chemistry: Post your doubts here!

    no it's D
  11. janasalem

    Chemistry: Post your doubts here!

    Can someone explain this to me ?
  12. janasalem

    Physics: Post your doubts here!

    how to know how many significant figures i should write coz sometimes in the marking scheme they only give one answer
  13. janasalem

    Physics: Post your doubts here!

    http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Physics%20(9702)/9702_s11_qp_21.pdf question 2b(ii) when i calculated the percentage uncertainty i used the full answer of the percentage but my actual uncertainty was differnent. in the marking scheme they...
  14. janasalem

    Physics: Post your doubts here!

    http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Physics%20(9702)/9702_w10_qp_21.pdf question 2b(ii) does the horizontal distance also decrease due to air resistance ?
  15. janasalem

    Physics: Post your doubts here!

    http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Physics%20(9702)/9702_w13_qp_11.pdf question 17 please
  16. janasalem

    Chemistry: Post your doubts here!

    no it's a question in the book how about this question Number 7 http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Chemistry%20(9701)/9701_w10_qp_11.pdf
  17. janasalem

    Chemistry: Post your doubts here!

    is this in the As level syllabus coz they dont mention this type of geometry
  18. janasalem

    Chemistry: Post your doubts here!

    what is the shape of Xenon tetreflouride and how can we find out the shapes of different compounds?
  19. janasalem

    Physics: Post your doubts here!

    A cylindrical tube rolling down a slope of inclination θ moves a distance L in time T. The equation relating these quantities is L (3+a^2/P = QT^2sinθ Where a is the internal radius of the tube and P and Q are constants. Which line gives the correct units for P and Q?
  20. janasalem

    Physics: Post your doubts here!

    http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Physics%20(9702)/9702_s03_qp_1.pdf question 7 explanation please for vertical component
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