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  1. blabla

    BIOLOGY......P34 HOW WAAAAS IT!!!!??????

    haha mine didnt rise at all either :P st. joseph im assuming? most people i asked had the same problem, so dont worry!
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    How was Bio P34 ?!?

    haha in my first experiment, the H2O2 turned into water so my filter paper rose to the surface before 3 min only for the 100% and the 80% concentration :\ and most people who gave the exams with us had the same problem, for some none of them rose at all! majority of the people had the same...
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    Some biology practical doubts

    http://classes.midlandstech.edu/carterp/Courses/bio211/chap17/Slide3.JPG
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    Any guesses for bio prac 34??

    thanks a lot! btw how do you know this so accurately? :O
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    Some biology practical doubts

    anybody got any good lung slides? they're soo weird...cant figure them out :\
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    "A-Level exams are finally going to get harder" -CIE

    wonderful. i'm so screwed. i effed up in all my exams, and i was hoping the gt would be low but NOOO
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    Some biology practical doubts

    the second ones right in my opinion - in the site i got this info from, they added this amount to 2 cm depth of protein sample, and they used 10% KOH solution. We probably wont be given this concentration anyway in the exam - at least in our school we are given 5% KOH. So I'd go for the 2nd option!
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    Some biology practical doubts

    I'm worried about the labeling bit as well, especially when we have to label xylem and phloem and cortex and pith and what not :P These sites have really good labelled slides, you could check them out. Theres some extra stuff here though, just look at the ones with xylem and phloem in them...
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    Some biology practical doubts

    1. As far as I know, we put the solution with the bendicts reagent in a water bath already at 100 degrees. 2. I usually keep it around 4-5 minutes. Sometimes it takes even less time. In general, if no color change appears after 5-6 mins, it probably has no sugar. 3. 5drops of CuSo4, 10...
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    Chemistry Paper 22: Discussion and Grade Threshold

    46-48 would be my guess. my paper wasnt so good though :\ i dunno why, i had a pretty good prep. its really frustrating :(
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    A level Biology: Post your doubts here!

    i put all the vascular bundle slides for monocot and dicot stem and roots in one page, i keep getting confused :p in case anyone needs it too!
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    AS MECHANICS p42 is (!!!!!!!!!!!!!!!!!!!!!!!!!), discuss after 24H

    my exams were horrible :( aaahh i'm so glad im not the only one though :)
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    M1 doubts

    thank you so much! that was a very good explanation :)
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    M1 doubts

    Q:3 http://www.xtremepapers.com/CIE/International%20A%20And%20AS%20Level/9709%20-%20Mathematics/9709_w10_qp_41.pdf somebody help pleeeease! :(
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    any help for mechanics ??

    awesome notes! but in the the formula to find resultant force, why is it R^2 = F1^2 + F2^2 + 2F1F2Cos theta? we're basically using the cosine rule so shouldnt it be R^2 = F1^2 + F2^2 - 2F1F2Cos theta?
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    Mathematics: Post your doubts here!

    could you please explain why you did the a = 10 sin theta bit? thanks :D
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