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  1. H

    M1 math

    use the concept of free body diagram....take lower mass in isolation...label forces acting on it.....friction b/w two boxes to ryt.....friction of whole object with ground........wachout i used the word whole object.....force p to left.....and normal force upwards.... do the same for upper...
  2. H

    bio practical....

    the piece was stained with methylene blue b4.....wat does he asks us to do in step 5.....i cnt understnd.....does he wants to remove the stain
  3. H

    MOMENTUM

    Pi=0 so speed of 1 kG trolley will be 4m/s by principle of conservation of momentum...now obtain k.e for both trolleys and add them since k.e is scalar quantity so dont worry abt direction..thsi sum will be equal to energy stored in the spring by principle of conservation of momentum....from my...
  4. H

    bio practical....

    http://www.xtremepapers.me/CIE/Internat ... _qp_33.pdf how shud its result table look like for question 1
  5. H

    qualitative analysis help...

    hey..plx tell me abt Al,Pb,Zn.....cations.....also tell if they dissolve in excess wat their soln looks like.......and having difficulty with finding whether its a ppt or has it dissolved...wats standard method for that...thanx
  6. H

    qualitative analysis help...

    if for e.g we were given coloured solution like copper chloride which is blue and chromium chloride how cn we test for halide ion....b/c solutions are coloured and it will be smwat difficult to record white ppt
  7. H

    Bio notes needed!!!! Infectious disease

    http://ebookee.org/Mary-Jones-quot-Camb ... 98939.html download this endorsed revison guide....contains some excellent notes
  8. H

    Practical papers graph qs

    cn u tell me abt best-fit...how much scatter will loose quality marks...
  9. H

    Biology Practical notes!!

    there was a practical abt counting no. of stomata ...hav u performed dat
  10. H

    BIo exemplar material

  11. H

    Biology Practical notes!!

    WHAT IS antigenic concealment...?..
  12. H

    physixx help needed

    from principle of superposition:amplitude after interference of two waves will be 1 unit....so since amplitude has been decreased by 3 times w.r.t A......the resultant intensity will be reduced 3^2 times i.e it ll be 1/9
  13. H

    physixx help needed

    from principle of superposition:amplitude after interference of two waves will be 1 unit....so since amplitude has been decreased by 3 times w.r.t A......the resultant intensity will be reduced 3^2 times i.e it ll be 1/9
  14. H

    role of rhizobium...

    hmm...i found some detail in our book which we dont usually care about but it offers good explanation: rhizobium uses nitrogenase to combine nitrogen and hydrogen....ATP sis needed and also anaerobic conditions helps legume plants to colonise nitrogen deficient soils........
  15. H

    practical guesses and IRs

    or IR info
  16. H

    practical guesses and IRs

    ANY prediction for paper 33 which is on 12 MAY....i have paper 33
  17. H

    Biology Practical notes!!

    i request from planet master or moderators to kindly make this topic STICKY !!!
  18. H

    Biology Practical notes!!

  19. H

    Biology Practical notes!!

    thank you very much...these r some file from revision book of cambridge AS biology
  20. H

    practical guesses and IRs

    any IR info or guesses for as phy chem and bio practicalss
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