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  1. Abdul Hanan

    Biology; Chemistry; Physics: Post your doubts here!

    this is because coil become electro magnet ,closing the circuit P parallel so gets enough voltage while R AND Q series so dim as voltage devide in them
  2. Abdul Hanan

    Biology; Chemistry; Physics: Post your doubts here!

    take products of values.(p=rgh) heighest will be C that is 30x1.2x10=360
  3. Abdul Hanan

    Biology; Chemistry; Physics: Post your doubts here!

    90-30 gives incident angle =60
  4. Abdul Hanan

    Biology; Chemistry; Physics: Post your doubts here!

    i dont think any marks are deducted for not bending inside but if they are, do tell me!!!
  5. Abdul Hanan

    Biology; Chemistry; Physics: Post your doubts here!

    2nd one is B as volume of air is decreased in container which leads to more volume in balloon as pressure to its outside walls decreased . pressure in balloon decreases as volume increased of balloon. and particles hit walls of balloon less often.
  6. Abdul Hanan

    Biology; Chemistry; Physics: Post your doubts here!

    look at inner walls of the wooden blocks..... first points at 3.5 2nd at 8 so 8-3.5=4.5 :)
  7. Abdul Hanan

    Biology; Chemistry; Physics: Post your doubts here!

    i always do it with the formula........ i dont think there can be more elaboration ....
  8. Abdul Hanan

    Biology; Chemistry; Physics: Post your doubts here!

    it just simply needs to be measured its A.....
  9. Abdul Hanan

    Biology; Chemistry; Physics: Post your doubts here!

    yea one crest and one trough.......
  10. Abdul Hanan

    Biology; Chemistry; Physics: Post your doubts here!

    The last in 72 years there will be 3 half lives as 1 is of 24 so u can use formula 1/2^n where n is number of half lives which will equal 1/8 ans.D
  11. Abdul Hanan

    Biology; Chemistry; Physics: Post your doubts here!

    for 35..... 1 wavelength contains 4 blocks (1 wavelength=1 whole round) so 4x5=20ms answer C
  12. Abdul Hanan

    Biology; Chemistry; Physics: Post your doubts here!

    for 28....if its 4A in 6ohm then it will be 2A in 12ohm total =6A answer B
  13. Abdul Hanan

    WAS IT A OR C GUYS IN BIO THEORY!

    sir "IMRAN MERCHANT" said it is C. Maybe he is wrong , so do not continue this argument and wait for the marking scheme..as no one knows the answer in it :) by the way my answer was C and i am satisfied with all what i wrote there....:)
  14. Abdul Hanan

    Biology; Chemistry; Physics: Post your doubts here!

    what!!!!!!!!!!!!!!!!! what proof u have :p??
  15. Abdul Hanan

    Biology; Chemistry; Physics: Post your doubts here!

    kesay ho ga :p mujhay samajh he nai aa rahi marking scheme ki.... how can the reading be between R and S and more intense than R although its going in a crack......? :D
  16. Abdul Hanan

    Biology; Chemistry; Physics: Post your doubts here!

    http://papers.xtremepapers.com/CIE/Cambridge International O Level/Physics (5054)/5054_s10_qp_22.pdf Q.10)b)iv) one of the toughest questions i could face :D please explain... thnx :D
  17. Abdul Hanan

    Biology; Chemistry; Physics: Post your doubts here!

    got it :D thnx!:D
  18. Abdul Hanan

    Biology; Chemistry; Physics: Post your doubts here!

    guys if you could clear this mystery for me i would be very thankful :p the answer is C
  19. Abdul Hanan

    Biology; Chemistry; Physics: Post your doubts here!

    i do not actually understand your question sorry but you can find image positions by extending your reflected rays to behind the mirror.......(and see point of intersection) and keep angle i=angle r always in reflection .......
  20. Abdul Hanan

    Biology; Chemistry; Physics: Post your doubts here!

    here you go! :) this is the way you can find the region visible by student Y,X & Z (represented by different colours) i have made image of all three as well. note that every student can see the image of other 2..... you could also make reflected rays instead of making the visible regions...
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