• We need your support!

    We are currently struggling to cover the operational costs of Xtremepapers, as a result we might have to shut this website down. Please donate if we have helped you and help make a difference in other students' lives!
    Click here to Donate Now (View Announcement)

Recent content by athaan

  1. A

    Physics: Post your doubts here!

    I'd like a clear explanation about fission of nuclei. I can't seem to get it right. (90 38) Sr -> (90 39)Y + (0 -1) e + 0.55MeV why would it release energy if the binding energy of Y is greater than Sr? I'd understand if Sr has greater binding energy, but in fact it does not. I'm trying to...
  2. A

    How Did Your Chemistry MCQ paper go ?

    Quite tough. Really. :s I don't think I did my chemistry well enough. Many long questions, I had hard time understanding them--so it really takes up a lot of time! D: i hope the threshold won't be too high.
  3. A

    Chemistry MCQ thread...

    aren't we not supposed to discuss the questions before 24h of the test...?
  4. A

    Chemistry MCQ thread...

    Oh my, I'd say the paper was quite hard! I even didn't finish on time :(
  5. A

    biology paper 1 doubts

    It was a bit easy, honestly--since I see many reappearing questions! But that doesn't mean I'm very confident on scoring an A for paper 1. But there are questions which I'm not confident with, so I might score a C for my paper 1. Hope that doesn't affect my final result much!
  6. A

    biology paper 1 doubts

    Q38. usually the consumer only able to take around 0.1 [or 10%] of the net productivity of the organism before them caused by many factors, e.g. some parts are unable to be eaten. phytoplankton [1.3*10^3] ----> zooplankton herbivore [1.3*10^2] ----> zooplankton carnivore [1.3*10^1] ----> small...
  7. A

    biology paper 1 doubts

    thank you! this clears my confusion when doing problems about respiratory system, so at least I can know where epidermis and the smooth muscle are located.
  8. A

    biology paper 1 doubts

    What is the role of epidermis and smooth muscle in respiratory system?
  9. A

    biology paper 1 doubts

    Yes, it does.
  10. A

    biology paper 1 doubts

    I'd be happy to be taught by your teacher xD I understand a lot of stuff more after searching it in internet and browsing through wikipedia pages. although it has more things that would confuse me, at least I understand it a little bit better! I was quite shocked knowing there would be a...
  11. A

    biology paper 1 doubts

    The paragraph talks more about the tree itself rather than its surrounding, and the roles of the tree. Therefore it's the niche. olevel.sourceforge.net
  12. A

    biology paper 1 doubts

    can you specify the variant? :0
  13. A

    biology paper 1 doubts

    i it has been stated from the question, that the net productivity of the producer is 1.8%. but the actual energy the herbivore [primary consumer] receive is only 0.75%. therefore, the proportion is 0.75/1.8, the ratio of energy received to energy sent.
  14. A

    biology paper 1 doubts

    I guess it's asking for the gradient. B has the steepest gradient, meaning the changes of saturation in percentage per unit is the highest.
  15. A

    biology paper 1 doubts

    that's kinda confusing, because the answer is D. if it's directly proportional, shouldn't it be C? or there's a limit?
See more
Top