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  1. B

    Mathematics: Post your doubts here!

    http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Mathematics%20(9709)/9709_w04_qp_4.pdf Can anybody explain question 6 please in detail? I've been stuck in this question for quite a long while and I would be very thankful to anyone who can give me a detailed...
  2. B

    Mathematics: Post your doubts here!

    I have seen equations like F<uR and so on without the traditional F=uR equations. Can anyone please explain to me the conditions for all inequality equations involving uR?:)
  3. B

    Physics: Post your doubts here!

    OK, for b) part you need to know the concept of stationary waves. Do you have the physics coursebook?
  4. B

    Physics: Post your doubts here!

    They are saying that point A moves 80mm. Point A is a point on the rope and it is not moving sideways but only moving up and down. So it moves 80mm first going up to amplitude then it goes back to equilibrium position back down to a trough and back up so the actual amplitude is 80/4=20.:)
  5. B

    Physics: Post your doubts here!

    http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Physics%20(9702)/9702_w07_qp_2.pdf Can anyone please explain question 4)c) in detail with long explanation, please?
  6. B

    Physics: Post your doubts here!

    Can someone tell me how much we must score for physics theory paper to score a A grade?
  7. B

    Physics: Post your doubts here!

    Can anyone tell me whether in theory papers they will cut marks for significant figures because sometimes it is to 2 and sometimes 3. Sometimes when the data is to 2 s.f. even the answers are to 3 s.f?
  8. B

    Physics: Post your doubts here!

    I haven't found that in papers but it was in the the physics AS and A Level Coursebook.
  9. B

    Physics: Post your doubts here!

    http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_s12_qp_21.pdf Can anyone explain why 0.4s is wrong for 3)b)ii) ?:)
  10. B

    Physics: Post your doubts here!

    Can anyone please give me some notes on the potentiometer and it various functions as measuring a EMF of a battery, comparing EMFs of 2 batteries?:)
  11. B

    Chemistry: Post your doubts here!

    Can anybody tell me the errors for the apparatus we normally get for the practical exam?
  12. B

    Practical | GUIDE BOOK(free Download) | POST YOUR DOUBTS HERE.

    Can anyone give tell me the maximum errors for the apparatus we normally use in the lab?
  13. B

    Chemistry: Post your doubts here!

    Why won't SO2 wont show up?
  14. B

    Chemistry: Post your doubts here!

    Can how can we test with limewater will they provide with the tube and all? And what if the gas is poisonous then we cant smell it, who knows whether it is SO2.
  15. B

    Chemistry: Post your doubts here!

    For the practical paper can we get to test for gases other than NH3 and how to test for them?
  16. B

    Chemistry: Post your doubts here!

    What is 60 and what is 40?
  17. B

    Chemistry: Post your doubts here!

    Can anyone tell me the weightage for P1 and P4 for mathematics?
  18. B

    Chemistry: Post your doubts here!

    Can anyone please give me marking scheme explanations for what are electrophiles, nucleophiles and free radicals?
  19. B

    Chemistry: Post your doubts here!

    http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Chemistry%20(9701)/9701_w04_qp_2.pdf Can anyone explain why in Q3)b)ii) why they are saying in the marking scheme that bonding changes from covalent to ionic? Because my opinion is that HCl is ionic.
  20. B

    Mathematics: Post your doubts here!

    why is it greater than 0 rather than<-1?
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