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Recent content by Jinosupreme

  1. J

    Physics: Post your doubts here!

    Anyone can help in question 3B? Pls thanks!!!
  2. J

    Physics: Post your doubts here!

    PAPER5 doubts, So for question 2, we obtained gradient and y-intercept, the questions after that, are we suppose to use raw gradient and y-intercept in calculations, or the round up gradient and y-intercept? Thanks guys!
  3. J

    Chemo P5 tips

    Got one year past year s10, p52, question 1, draw diagram for determining boiling point, WHY MUST THE BUKB OF THERMOMETER BE AT HALF OF THE LIQUID AND HALF AT SURFACE? PLEASE HELP :(
  4. J

    Chemistry: Post your doubts here!

    so I can just draw a circle then arrow spin to left, then another circle arrow spin to right?
  5. J

    Chemistry: Post your doubts here!

    GUYS NEED HELP, FOR PAPER4 chemistry For NMR, One year mark scheme says "Drawing suitable diagrams showing the origin of two energy states" How to draw?
  6. J

    Chemistry: Post your doubts here!

    Guys need help, I get A why it is coplanar, but not B,C,D,E? Why??
  7. J

    Chemistry: Post your doubts here!

    I think this is a good image for alpha helix
  8. J

    Chemistry: Post your doubts here!

    Guys! Need help! For the 3rd one, why is it no reaction? Isn't it carboxylic acid + alcohol reaction?
  9. J

    Chemistry: Post your doubts here!

    Need help! why is the product at anode for MgBr is Br2? Isn't it suppose to be oxygen?
  10. J

    Chemistry: Post your doubts here!

    http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Chemistry%20(9701)/9701_s13_qp_42.pdf GUYS! Need help in paper 4! Can someone explain question 1 Biv) I have no clue how to calculate the rate, and dont understand the mark scheme. Pls thanks!
  11. J

    *Biology Paper 5 tips*

    Does that mean Chi Squared test is more likely to use (n-1)+(n-1) as it is comparing 2 mean value of 2 sets of data? Umm what about T test? :)
  12. J

    *Biology Paper 5 tips*

    NEED HELP! I am a bit confused with Degree of Freedom, When do we use n-1? When do we use (n-1)+(n-1)? Help please guys :)
  13. J

    A level Biology: Post your doubts here!

    A graft of tissue, such as skin, from a different person is usually rejected by the body. Which statement about graft rejection is correct? A The graft is rejected by B-lymphocytes because they make and release antibodies which react with the surface antigens on the graft cells. B The graft is...
  14. J

    AS Biology P1 MCQs Preparation Thread

    A graft of tissue, such as skin, from a different person is usually rejected by the body. Which statement about graft rejection is correct? A The graft is rejected by B-lymphocytes because they make and release antibodies which react with the surface antigens on the graft cells. B The graft is...
  15. J

    A level Biology: Post your doubts here!

    In many freshwater ecosystems, the availability of inorganic nitrogen compounds is a limiting factor for growth. This means that producers cannot grow as quickly as they could even though no other factor is limiting. Which statements about these ecosystems are correct? 1 Transfer of energy to...
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