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  1. ahmed abdulla

    Physics: Post your doubts here!

    According to the AS knowlege you are right > but to gain three marks you should talk about work and how potential differs
  2. ahmed abdulla

    Physics: Post your doubts here!

    Q . 4 c(ii) .. why its negative ?
  3. ahmed abdulla

    Mathematics: Post your doubts here!

  4. ahmed abdulla

    Mathematics: Post your doubts here!

    question 7 (ii)
  5. ahmed abdulla

    Mathematics: Post your doubts here!

    thats also my worst toppic . Thanks bro
  6. ahmed abdulla

    A level Biology: Post your doubts here!

    For paper5 .. all science subjects .. do we have to write the answer for the 15 mark(phy) . 10mark(bio) ,7mark(chem) questions in points or in story type??
  7. ahmed abdulla

    Mathematics: Post your doubts here!

    q-9(ii) complex no.
  8. ahmed abdulla

    Physics: Post your doubts here!

    Application part can anyone solve it? http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_s09_qp_4.pdf q. 11 b(iii) http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_s10_qp_41.pdf q. 10 b
  9. ahmed abdulla

    Mathematics: Post your doubts here!

  10. ahmed abdulla

    Mathematics: Post your doubts here!

    how crazy i am , hhhh this formula , just takes the 1/2* pi/12 out .. and the rest is the same :LOL:
  11. ahmed abdulla

    Mathematics: Post your doubts here!

    Thanks , i completely got it .. but i think there is a formula for trapezium rule which is much faster and saves time .. if you can do it that way
  12. ahmed abdulla

    Mathematics: Post your doubts here!

    if this way confuses you , find dy/dx =0 you will get x values , plug this x values in the second derivative .. and they must be positive which shows its minimum it you draw the graph , it will be parabola , and its least value ( vertex) will be ABOVE x -axis , which shows its positive and...
  13. ahmed abdulla

    Mathematics: Post your doubts here!

    The gradient of this function can be found by the first derivative. Find the vertex of this function by taking the second derivative, and setting it equal to zero. Fill in this value ( x value of vertex ) into the first derivative to find the y-value of the vertex. Take the third derivative to...
  14. ahmed abdulla

    Mathematics: Post your doubts here!

    from part(i) ..Rsin(A+b) we know that greatest ( maximum ) value of sin function is 1 which happens when teta is 90 degree
  15. ahmed abdulla

    Mathematics: Post your doubts here!

    i tried , but i didnt get it :D Dont worry , doing in both ways will gain full marks . and i dont think this complicated questions will be asked (y)
  16. ahmed abdulla

    Mathematics: Post your doubts here!

    Trapezium rule , i continously get it as 1.15 but the answer is 0.98 any help?
  17. ahmed abdulla

    Mathematics: Post your doubts here!

  18. ahmed abdulla

    Mathematics: Post your doubts here!

    can someone do the SECOND part of both questions ? TheZodiac
  19. ahmed abdulla

    A level Biology: Post your doubts here!

    This question is related to sex , male and female ?
  20. ahmed abdulla

    A level Biology: Post your doubts here!

    Hi everyone , I went yesterday through genetic crosses and today tried to solve some papers , in some questions they are using xx/xy when female/male involved and other crosses they are using crosses which involve other locus like the question i posted below , any one has clue when to use xx/xy...
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