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  1. H

    help required 9702_w03_qp_2

    we have to draw a graph of v against s....use third eqation....v^2=u^2+2as where u is zero so we get v^2=2as.....now taking sqrt...v=sqrt.(2as)....we can also write it as v=sqrt.(2a)times sqrt.(s)...since acceleration is a constant in this equation we can write it as v=k.sqrt(s).....so its a...
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    help needed!! 9702_w10_qp 11

    q7....its D bcos air resistance will have effect on both components of motion and horizontal velocity will thus decreaSE Q12...its b.jxt remember that for elastic collision relative speed of approach is equal to relative speed of separation after the collision and for inelastic collision...
  3. H

    physxx paper 4 grade threshold

    http://www.xtremepapers.net/CIE/Interna ... s08_gt.pdf see it says u get an A if u score 49 out of 100..isnt it strange and in other years also its hardly rising above 60
  4. H

    help with -hysics June:2004

    well linear momentum is conserved if u take both ball and the plate 2gether as a system rather than the ball alone....so the change in momentum experienced by th ball would have been delivered to the plate downwards
  5. H

    need help on CHEM mCqS

    k
  6. H

    need help on CHEM mCqS

    anyone........?
  7. H

    Help required 9702 Physics June 2005 Paper:2

    since the smoke particles are larger now collisions will tend to average out.........this means that the no of collisions on one side will be averaged out by the no of collisions on the corresponding opposite end.......due to this there ll be less jerky motion resistor and internal resistance...
  8. H

    need help on CHEM mCqS

  9. H

    chemistry practicals....

    plx privide me the link ....or tell me which vaariant
  10. H

    chemistry practicals....

    so u know any else or these r the only one in new syllabus
  11. H

    chemistry practicals....

    cn somebody tell me wat are the possible question 1 expts in as chemistry paer lyk i know for e.g titration,enthalpy change expts....any other u guyx know??
  12. H

    help with 9702_w09_qp22

    just add these words.....the speed i have calculated in previous part is of these two waves which interfered
  13. H

    help needed: 9702_s07_qp02

    its a projectile motion type scenario....we r using 2nd equation for vertical motion......and initially vertical component of velocity was zero
  14. H

    URGENT HELP -->Physics!

    http://www.youtube.com/watch?v=AMBcgVla ... re=related check out s-cool.co.uk
  15. H

    Physics help needed For AS level

    q 18 on ryt handside the liquid rises by h meaning that it falls by h on left handside so the height difference is 2h and ANS is therefore D Q 20 ITS JUST proportionality...E=Fl/Ae e(extension;f force;a.. area) rearrange this to give F=EeA/L ......WHERE e AND E are constant so lets call them k...
  16. H

    help with 9702_w09_qp22

    the question is saying that how a STATIONARY wave has a speed....in anser you shud refer to its formation i.e when incident and reflected waves superpose a stationary wave is formed and the speed calculated in part is of these incident and reflected waves that have been superposed
  17. H

    9702 Physics w09 qp21

    u can use a ripple tank for diffraction by placinga barrier in water tank.....which will be illuminated from above and beneath water tank there will be screen where wave fronts can be seen....by turning motor on waves will be generated and will diffract and bend as they pass the barrie....u cn...
  18. H

    Hydrogen Bonding--chemistry

    Notice that each water molecule can potentially form four hydrogen bonds with surrounding water molecules. There are exactly the right numbers of hydrogens and lone pairs so that every one of them can be involved in hydrogen bonding. This is why the boiling point of water is higher than that...
  19. H

    Significant Figures

    there are some rules to follow read the attached file.....
  20. H

    Significant Figures

    as far as i know the A mark (answer mark) will be awarded only if ur answer matches ms anser
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