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  1. P

    *Biology Paper 5 tips*

    it is in oct/nov p53 question 2 part b(ii) i dont know how to find the E expected value in chi squared test
  2. P

    *Biology Paper 5 tips*

    okay i tried solving it that way but still didnt get the answers did you do it??
  3. P

    *Biology Paper 5 tips*

    hey can anyone explain me how to find E expected value in chi squared test i know we can find by finding the mean of the observed value what is the other method cause in nov 11 p53 question two i am not gettin the correct answer! Help!
  4. P

    Chemistry: Post your doubts here!

    ok so here i have a chemistry p5 question 2 ....... so dont skip this question i really need the answer!!!! http://www.xtremepapers.com/papers/CIE/Cambridge%20International%20A%20and%20AS%20Level/Chemistry%20(9701)/9701_s08_qp_5.pdf so in Q2 part (f) they asked to draw construction lines so can...
  5. P

    Chemistry: Post your doubts here!

    hey so i have a question here of november 2007 question 4 part b http://www.xtremepapers.com/papers/CIE/Cambridge%20International%20A%20and%20AS%20Level/Chemistry%20(9701)/9701_w07_qp_4.pdf can anyone explain me why in part(a) the sign is negative and in part(b) why we are not taking the value...
  6. P

    AS Physics P1 MCQs Preparation Thread.

    CAN ANYONE EXPLAIN ME THESE QUESTION http://www.xtremepapers.com/papers/CIE/Cambridge%20International%20A%20and%20AS%20Level/Physics%20%289702%29/9702_s11_qp_11.pdf Q7 Q9 Q13 Q15 Q27 Q25 Q34 PLEASE I REALLY NEED HELP IN THIS PAPER
  7. P

    AS Biology P1 MCQs Preparation Thread

    http://www.xtremepapers.com/papers/CIE/Cambridge%20International%20A%20and%20AS%20Level/Biology%20%289700%29/9700_s11_qp_11.pdf heyy can anyone explain QUESTION 20........ still confused about the concept of mitosis ans meosis THANKYOU
  8. P

    AS Biology P1 MCQs Preparation Thread

    CAN SOMEONE PLEASE HELP ME WITH THIS QUESTION http://www.xtremepapers.com/papers/CIE/Cambridge%20International%20A%20and%20AS%20Level/Biology%20%289700%29/9700_w05_qp_1.pdf QUESTION NO. 23 !!!!!
  9. P

    AS Physics P1 MCQs Preparation Thread.

    http://www.xtremepapers.com/papers/CIE/Cambridge%20International%20A%20and%20AS%20Level/Physics%20%289702%29/9702_s09_qp_1.pdf Question 13 can you show me the working?
  10. P

    AS Physics P1 MCQs Preparation Thread.

    http://www.xtremepapers.com/papers/CIE/Cambridge%20International%20A%20and%20AS%20Level/Physics%20%289702%29/9702_s09_qp_1.pdf Question 10 need explanation.
  11. P

    AS Physics P1 MCQs Preparation Thread.

    A laser emits light of wavelength 600 nm. What is the distance, expressed as a number of wavelengths, travelled by the light in one second? A 5 × 108 B 5 × 1011 C 5 × 1014 D 5 × 1017...
  12. P

    AS Physics P1 MCQs Preparation Thread.

    yes the answer is b thankyou
  13. P

    AS Physics P1 MCQs Preparation Thread.

    An Olympic athelete of mass 80kg competes in a 100m race what is the best estimate of his mean KE durind race? may/june 05 question 2 A 400 j B 4000 C 40000 D 400000 Can you tell me which formula is used here to solve this
  14. P

    A level Biology: Post your doubts here!

    how to calculate tidal volume?
  15. P

    A level Biology: Post your doubts here!

    can anyone answer this question Explain how sucrose in the phloem sap is moved from sieve tube elements in leaves to cells in a sink, such as a root. 9700_w11_qp_21 oct/nov 11 question 5(c)
  16. P

    Chemistry: Post your doubts here!

    i dont know i just got a headache trying to solve this thing huh
  17. P

    Chemistry: Post your doubts here!

    11 0.144 g of an aluminium compound X react with an excess of water, to produce a gas. This gas burns completely in O2 to form H2O and 72 cm3 of CO2 only. The volume of CO2 was measured at room temperature and pressure. What could be the formula of X? [C = 12.0, Al = 27.0; 1 mole of any gas...
  18. P

    AS Chemistry Doubts

    look again carefully it is a carboxylic acid not aldehyde or ketone.
  19. P

    AS Chemistry Doubts

    i prefer a fork now off you go
  20. P

    AS Chemistry Doubts

    awee arent you a little genius. anyway how many marks are you getting in p1 ?
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