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  1. T

    Physics: Post your doubts here!

    When drawing error bars how long do the error bars have to be? Do each of the length of the error bars depend on their uncertainty or are all the same length? Also, how do you draw the worst line of best fit?? Please help, this is emergency!
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    A level Biology: Post your doubts here!

    Yes can someone explain to me what is T test and when is it used in comparison to the chi square test? Also any idea as to what may come in paper five this year?
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    Mathematics: Post your doubts here!

    Can anyone please explain to me how to solve question number 3 II part b from may/june 2012, paper 31 the link to the qp is here: http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Mathematics%20%289709%29/9709_s12_qp_31.pdf The mark scheme link is here...
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    Chemistry: Post your doubts here!

    1. Moles before equilibrium: H2 - 0.60 I2 - 0.18 HI - 0 Moles at equilibrium: I2 - 0.18 - 0.16 = 0.02 (since 0.16 have reacted, the number of moles of I2 remaining will be the difference between .18 and .16 moles.) H2 - 0.60 - 0.16 = 0.44 (ratio of I2 to H2 is 1:1 so...
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    Chemistry: Post your doubts here!

    Can anyone tell me how the papers are going to be marked (their percentages)? I want to know how much each paper weighs, and how CIE will add AS and A level marks together, so I can estimate my marks. Please can anyone tell me, how the A2 papers weigh, and how the final mark will be given...
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    Preparing for the SAT Reasoning Test

    I took my SAT on dec 1st, and got my result I'm not too happy with them..I got a 1780 =( But I fit the accepted range for the colleges taht I'm applying too Deadline's at end of Jan which means I can only take one exm which should I do!??! Should I try out for SAT I again, or should I give a SAT...
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    biology paper 1 doubts

    http://www.xtremepapers.com/papers/CIE/Cambridge%20International%20A%20and%20AS%20Level/Biology%20%289700%29/9700_w10_qp_12.pdf Does anyone know why the answer to question number 9 is D??
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    biology paper 1 doubts

    Also do you know why the answer to question 24 is C? Once again, thanks!
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    biology paper 1 doubts

    ohh thank you! I just realized the option said amylase, i misread it as amylose the whole time. -.- Can't afford to make such silly mistakes in the actual exam..but thank you!
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    biology paper 1 doubts

    Also number 22, answer is A (amylose)..why?? Please and thank you!
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    biology paper 1 doubts

    http://www.xtremepapers.com/papers/CIE/Cambridge%20International%20A%20and%20AS%20Level/Biology%20%289700%29/9700_w11_qp_11.pdf question number 24: Answer is C (0.07s) why?? I thought answer would be B
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    biology paper 1 doubts

    Centromere is the region where two sister chromatids of a chromosome is joined together. During anaphase the microtubules of spindle pulls on the centromere first so that the sister chromatids can be pulled apart; this is what "centromere divides" refers to. Stages of mitosis are: prophase...
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    Biology P33 8 Nov

    Oh, I wasn't sure, in may/june we had to do an enzyme experiment with hydrogen peroxide, and also draw plan diagram of arteries and veins. Hope it's easier this time though =/ O/N papers are usually harder than M/J right? Do you know if the board will check winter session paper more strictly...
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    Biology P33 8 Nov

    does anyone have any idea of what might come in p33? Will the content be similar to the may/june paper?
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    oct/nov bio p33 syllabus, suggestions anyone??

    Anyone have any idea what might come on the oct/nov Bio practical paper 33 tommorow??? Will it be similar to the may/june question paper or any previous question papers? ...Help!
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