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  1. A

    physixx mcqs

    but isn't that the energy possessed by the system? the question asks for the energy provided by the motor...
  2. A

    bio mcqs..

    what year was this question from?
  3. A

    bio mcqs..

    @UAEgurl but since the root isn't a storage organ here, in fact it's actively growing, therefore using more sugars, shouldn't the sugars be moving in? i don't get why it should be B... i think it should be A :( help?
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    bio mcqs..

    percentage transfer of energy means how much of the total energy contained in the "food" is transferred. we know the greatest energy loss occurs between the sun and the primary consumer, so the least percent of energy is transferred. and we know that the energy loss becomes progressively less...
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    Maths p63 november 2010

    about mrs lin: she has to sit behind a student, right, so she can't sit in the front row... cuz then she can't be behind anybody. so she can sit in the last three rows, and two places in the second row. why only two places and not three? because one space in the front row will be occupied by mrs...
  6. A

    maths s1 june 2008 q3(i)

    :)
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    Maths p63 november 2010

    it's discussed here: viewtopic.php?f=26&t=5666
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    maths s1 june 2008 q3(i)

    sentence: "How many different arrangements of all 11 CDs on a shelf are there if the jazz CDs are all next to each other?" breakup: "How many different arrangements" = permutations "of all 11 CDs" = understandable... "the jazz CDs are all next to each other?" = of the 11 CDs, 3 contain Jazz...
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    Maths S1 using calc for mean and s.d.

    lol actually it takes like 20 seconds max, but yeah... when you have a calculator... =P see, few people even do 2+2 in their heads if there's a calculator in sight =P but it's easier to show some working if u're actually doing the working...
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    Maths S1 using calc for mean and s.d.

    okay, these are the steps i would use for finding the sd of, say, 1, 3, 6, 9, 1. find the mean (enter 1+3+6+9, then divide answer by n=4, giving u 4.75) 2. square the answer, save it in the calculator's memory. (=22.5625) 3. find sum of the squares of each term (enter 1^2 + 3^2 + 6^2 + 9^2 =...
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    physics p12 difficulty predictions :o

    and in physics 33 we had a question investigating the erm rotational ability of different widths of strips of graph paper and the other question was about how much a ruler supported on prism and wooden blocks on two ends sags when a weight is hung from its middle... both i think were lame and...
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    Maths S1 using calc for mean and s.d.

    yeah i guess :/
  13. A

    Maths S1 using calc for mean and s.d.

    depends on the number of marks, really, but i think if it's 2 marks just the formula, and the correct answer ought to work. however, it's always good to show the working, there's less chance of messing up, and more marks for the working seen in case u do mess up. personally, i usually copy the...
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    High grade thresholds in ph6 p22

    the paper was a little harder than most past papers i think gt will be like 35-38. @hassam how can anybody do all cie past papers and then additional past papers from ocr and stuff? O_O seriously, wow. it makes me feel like i don't deserve a good grade at all =P i barely managed doing just a...
  15. A

    Statistics doubt..... please help

    the solution is discussed here: viewtopic.php?f=26&t=5666
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    stats 1 question

    the question says find the probability it takes longer than 6.2 days to clear up, which is the same as no less than 6.2 days, which is what's in the marking scheme :) you prolly just misread the question :)
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    How was your Phy p2 and p5? Mine was terrible.

    the paper was easy but the TIME urgghhh why isn't physics for 1:15 like the other P2s?? @dreamgirl you sound SO like a grammarian :P where did u keep your phone? maybe nobody stole it, it was prolly an accident. trust me almost 100% of people at pats have awesome enough phones that they won't...
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    meV kinectic energy??????

    b)i) alpha particles are nuclei of helium, therefore mass=4, proton number = 2. just balance the numbers on both sides so the other dash is mass= 1, proton = 1, which could be a proton or hydrogen nucleus, but they're not asking u what it is... ii) 1. i don't get this part so can't help... the...
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    CIE papers, where are they checked??

    http://ask.cie.org.uk/system/selfservic ... NE_OFFSET= and it's even clearer here. wow i'm disappointed :/ Europe is low tech. and it's not even like they don't have the resources!
  20. A

    CIE papers, where are they checked??

    http://ask.cie.org.uk/system/selfservic ... LE_ID=5310 i think this article makes it clear they're sent to CIE. like, the hard copies. not the scanned stuff. there are other interesting articles there, too... wow CIE's old fashioned =P
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