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  1. M

    A2 Physics | Questions and Doubts [Post Here]

    Okay so firstly emission light spectrum is in case of hot gases whereas the absorption line spectrum is in case of cool gases. Emission line spectrum: In hot gases, the electrons have already gained the energy gap difference between successive levels and thus gradually are losing that energy...
  2. M

    Physics: Post your doubts here!

    (iii) is really weird i get 746. They already mentioned the volume of gas but they found it again. Dont get them. :P
  3. M

    Physics: Post your doubts here!

    Because it is after the first absroption that the internal reflection occurs. That is I is incident on the muscle and then atenuation or absroption occurs and then it reaches the boundary where it is internally reflected when it is comming back it is atenuated again.
  4. M

    Physics: Post your doubts here!

    Thing is, the ray is being absorbed twice and is being total internally reflected once. So first I is being absorbed so we have 0.39I being transmitted to the bone and muscle boundary. 0.33 times 0.39 is then being internally reflected so we have 0.33 x 0.39I. Then again when it is moving from...
  5. M

    Chemo P5 tips

    Thank You, the tips are very helpful.
  6. M

    Physics P1, P2 & P4 past papers chapter wise! :D

    U have to do this wid expressions.. first find the expression for overall resistance of the circuit.. which is 1/R= 1/R1+ 1/R2 for parallel plus the series. u get 3R/2 .. then do P=I2R for the whole circuit.. in R put the value of the combined resistance.. u will get an expression for I2 = 8/R...
  7. M

    Physics: Post your doubts here!

    Firstly, if there are 300 lines in 1mm then there would be 300 x 1000 lines in 1meter .. therefore D is 1/300000. taking lamda as @.. n@= d sin& put in the values of @ and d. and take the value of sin@ as 1 because thats the value for the maximum angle Find N.. it is somewhat 4.84 Thing is...
  8. M

    Physics: Post your doubts here!

    12: Its more of a mechanics question.. First find the acceleration from the two equations. . i- T-800= 8a and ii) 1200-0T=1200a .. u get a= 2ms-2.. we kno that for a pulley,, the two components travels the same distance and with teh same speed.. so the two bodies will meet half way between 18 m...
  9. M

    AS Physics P1 MCQs Preparation Thread.

    OCT 09 11 Number 12 The angle that T1 makes with R is greater than the angle that T2 makes with R. R has to be balanced by the horizontal componts of T1 and T2.. Let the angle be @ R= T1cos@ + T1cos@ and R= T2cos@ + T2cos@ We can see that for cos,, the greater the angle.. less the value of...
  10. M

    AS Physics P1 MCQs Preparation Thread.

    MJ 12 MJ 12 Nmber 12: First, we find the common acceleration, From the two formulas: ( linek in Mechanics) T- 800= 80a 1200-T= 120a We get acceleartion = 2. We kno that in case of pulley, the distance moved by man up is equal to the distance fallen by the bag, thus the two will come to...
  11. M

    AS Physics P1 MCQs Preparation Thread.

    OCT NOV 12 Paper 11 number 23: F=ke For spring R, Load is F is W and k is 3k Therefore, e= W/ 3k For P or Q, the load is W/2 and spring constnt is k. Therefore, e= W/2 /k or W/2k The Overall extension of P and Q is just one of there extensions.. Therefore, total extension is extension of...
  12. M

    AS Physics P1 MCQs Preparation Thread.

    http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Physics%20(9702)/9702_s12_qp_11.pdf NUMBER 36 ..
  13. M

    AS Physics P1 MCQs Preparation Thread.

    5 An athlete bends down and then jumps straight up into the air. At the instant he starts his jump three forces act on him – his weight, an upthrust from the air and the contact force with the ground. What is the correct order in increasing magnitude of these three forces? [1] A contact force →...
  14. M

    AS Physics P1 MCQs Preparation Thread.

    http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_s03_qp_1.pdf Number 30 and 34.. anyone?
  15. M

    AS Biology paper 22 May 13th 2013

    The question clearly mentioned "cold denaturation" so obviously the enzyme is somehow denatured in col condition s/...
  16. M

    Physics: Post your doubts here!

    the magnitude or strength of fields depends upon the separation between the lines.. if the separation is increasing then the strength of the field is decreasing and if the separation between the fields are decreasing, the field is increasing. When the field is approaching the earthed plate, u...
  17. M

    Physics P1, P2 & P4 past papers chapter wise! :D

    Thanks alot man!!
  18. M

    Physics: Post your doubts here!

    Can anyone solve Oct 10 P13 Number 37.
  19. M

    AS-CHEMISTRY TOPICAL FINALLY HERE

    THanks a lot>>:)
  20. M

    O' Level Geography (2217) Help!

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