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  1. 1

    post your Physics and Chemistry querries

    so how do u draw sigma bonds?? ive understand that PIE bonds are oval, right?? but sigma?? is it just a straght line?? :S
  2. 1

    post your Physics and Chemistry querries

    it depends on the lone pairs available just learn that tetrahedral shape has angle 109 piramidal has angle 107 linear shape has 180 trigonal planar has 120 bent shape is 104.5 no more :D
  3. 1

    post your Physics and Chemistry querries

    i dont understand sigma and pi bonds. and how to draw them for example: O/N 2007 Q1 b.ii) and d)
  4. 1

    Chemistry small doubt

    thanks, but could u use the data booklet to know if an element is strong oxidising agent or reducing agent?? And, does it mean that all non metals are good oxidising agent while metals are good reducing agent??
  5. 1

    Maths Paper 32

    it will be very low. lowest of all. if u know that threshold for M/J was 50 and that paper was easier that this one. this one will be 40-45 i think, far more difficult
  6. 1

    CHEMISTRY P5 HELP

    independent variable is the one that u change Dependent variable is the one that changes because u have changed something
  7. 1

    CHEMISTRY 22!!!

    pm me paper 21 please :D
  8. 1

    post your Physics and Chemistry querries

    the one about esters. when u add an alcohol and an acid to form ester. which one eliminates the OH group??? the acid or the alcohol
  9. 1

    Chemistry small doubt

    what is an oxidising agent and what is a reducing agent??? Why is chlorine a strong oxidising agent??
  10. 1

    Solved chem paper 5s

    ok thanks princess!!
  11. 1

    maths p32 ...how did it go???

    so how much u think grade boundary will be?? everyone from my center were crying .........
  12. 1

    PHYSICS P41.. how did it go??

    yes it was like that, but i forgot that formula :S what was the formula for electric potential energy?? and also gravitationall potential energy¿¿?
  13. 1

    maths p32 ...how did it go???

    fuking shit of paper!!!!!!!!11 i was aming for an A but now .. :S now just depends on THe grade boundary, hope that for an A is 40%
  14. 1

    Discuss Physics 4!!

    good luk ;D physics was a tuff paper :S
  15. 1

    Mechanics P5 Discussion . how did it go??

    Hello guys!! how did u find mechanics, it was challenging?? i got the last question wrong and the one of the string, with energy :S what grade would u think for an A??
  16. 1

    how do u prove this identity?? 2009 on

    cos4@ - 4cos2@ + 3 = 8sin^4@ with working out needed pleasee
  17. 1

    Mechanics paper 5 O/N 2007

    cant anyone help pleasE??
  18. 1

    Only chemistry paper 31 discussion :D

    thanks. chemistry is a dificult subject :S hope the graph is right.
  19. 1

    Only chemistry paper 31 discussion :D

    i did awful in this experiment, didnt have time to finish the QA, well just tested for the clorine and then didnt had more time left- im SAD for the graph, did anyone drew a curve with a straight line??? also, does anyone know why temp should be in the y axis???
  20. 1

    Mechanics paper 5 O/N 2007

    hi, can someone explain me the Q4. ii) of this paper. i know how to calculate it, but my answer gives 50ms^-1, while the march scheme shows another way and gives 47ms^-1. could someone do it , and explain wat answer they got?? 50ms^-1 like me or 47.5ms^-1 as march schme. thanks
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