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  1. Z

    Paper Discusion: Bio/52 & /51

    Hey Hey bro. For d) iii) i wrote that some of the fragments are not distinguishable from the others. The sharpness of the image is too low. Will that be accepted?
  2. Z

    *Biology Paper 5 tips*

    What's a heat screen? never heard of one And thanks! :)
  3. Z

    *Biology Paper 5 tips*

    What are the different ways of keeping temperature constant in an experiment? The two ways I can think of atm are thermostatically controlled water bath and Temperature controlled room
  4. Z

    *Biology Paper 5 tips*

    not needed
  5. Z

    *Biology Paper 5 tips*

    you should always write in the null hypothesis that the differences are not significant. That's what the null hypothesis is defined by
  6. Z

    AS Biology P1 MCQs Preparation Thread

    In question 38 multiply all the quantities of each row together to get the total energy... then arrange that total value in ascending order In question 22 in 3 when uracil is present C is 'nil' so thats thymine. Then B is always matching in composition with Uracil or Thymine so B is adenine...
  7. Z

    AS Biology P1 MCQs Preparation Thread

    The answer is C because one cardiac cycle lasts for .75 seconds... One minute has 60 seconds so divide 60 by .75 and the answer will be 80
  8. Z

    Physics: Post your doubts here!

    Wow thank you so much :) i should've read the question more carefully. Didn't see that percentage uncertainty is the same!
  9. Z

    Physics: Post your doubts here!

    http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Physics%20%289702%29/9702_w12_qp_11.pdf Question 6 This is the only problem i have out of the entire Question Paper someone please solve this :) thanks
  10. Z

    Physics: Post your doubts here!

    http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Physics%20%289702%29/9702_w12_qp_11.pdf Someone please explain no 6 : ) , thanks
  11. Z

    Chemistry: Post your doubts here!

    I appreciate it but thats not the right answer... some reactions such as enthalpy change from the combustion of glucose can be obtained just by using a calorimeter so Hess's Law is not needed...
  12. Z

    Chemistry: Post your doubts here!

    IMPORTANT QUESTION! What types of enthalpy changes can only be obtained by application of the Hess's law?
  13. Z

    Urgent Advice Needed... PLEASE...

    Arabic all the way bro! (Y) My friend Amal from Israel can speak Arabic very well and she did the course and she found it very interesting! Afwan
  14. Z

    Mathematics: Post your doubts here!

    thankyou! :D
  15. Z

    Mathematics: Post your doubts here!

    http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Mathematics%20%289709%29/9709_w09_qp_62.pdf need help on question 1(ii) ! please :)
  16. Z

    Mathematics: Post your doubts here!

    http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Mathematics%20%289709%29/9709_w09_qp_62.pdf Need help in question 1 (ii) please :)
  17. Z

    Physics practical tips

    Whats the absolute uncertainty of a vernier caliper?
  18. Z

    Mathematics: Post your doubts here!

    Okay thanks :) and what about the radian question??
  19. Z

    Mathematics: Post your doubts here!

    General Questions: Should we underline our final answers with a double line? Some people say we should because it helps the examiner. And when writing down degrees in radians... do we have to use the word 'radian' ? such as 1.21 radian
  20. Z

    Maths IGCSE May/June 2012 Papers 22 and 42 marked

    I think in the trigonometry question the letter 'o' has two lines of symmetry as it is not a perfect circle
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