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  1. L

    Physics: Post your doubts here!

    Whoops. Fixed. :P
  2. L

    Physics: Post your doubts here!

    eV = electron volt, and MeV = mega electron volt. e = magnitude of charge on electron = 1.6 x 10^-19. Units = C. V = voltage. Units = J/C. When they multiply, the units of C cancel out so you are left with J, meanings its a energy quantity. The M just means mega (10^6). So if you want to...
  3. L

    Post Your AS LEVEL PHYSICS PAPER 2 DOUBTS

    Yes, I can. Thanks. :)
  4. L

    Physics: Post your doubts here!

    (a) (i) A & C Treat A to C as a straight line and forget everything else. The resistance will only be R. (ii) B & X The total resistance in parallel here is R/2, so the resistance at any point there is R/2. (iii) This is equal to the total resistance in series + total resistance in parallel...
  5. L

    Post Your AS LEVEL PHYSICS PAPER 2 DOUBTS

    Hmm, okay. Thanks. ^^ BTW, one more question (it's kind of related): http://www.xtremepapers.com/papers/CIE/Cambridge International A and AS Level/Physics (9702)/9702_w09_qp_21.pdf Q5 (c)
  6. L

    Physics: Post your doubts here!

    P and N are both in the horizontal direction, opposite to each other, with P facing the left and N facing the right (because P is positively charged and the direction of the electric field is to the right, so it would obviously go to the left).
  7. L

    Post Your AS LEVEL PHYSICS PAPER 2 DOUBTS

    http://www.xtremepapers.com/papers/CIE/Cambridge International A and AS Level/Physics (9702)/9702_w08_qp_2.pdf Please explain Q6 (b) (i) and (ii)
  8. L

    Post Your AS LEVEL PHYSICS PAPER 2 DOUBTS

    ..Oh I think I get it now, it's the distance between the first anti-node and node.. right?
  9. L

    Post Your AS LEVEL PHYSICS PAPER 2 DOUBTS

    I did. I drew an anti-node at the open end of the tube, a node at the piston end and a 2nd anti-node and node in the middle of them like this: (open end of tube) A...N...A...N (end of tube) ..I know the first harmonic has the lowest frequency but I thought it's supposed to be 0.5 lambda...
  10. L

    Overall Chemistry discussion AS May 2012.

    This should easily be an A. But anyway, why can't people bother calculating their grade themselves? o_O
  11. L

    Post Your AS LEVEL PHYSICS PAPER 2 DOUBTS

    Still, kinda don't get it. I read up some stuff on harmonics and it sort of understand the concept but I don't understand how you got lambda/4.
  12. L

    Post Your AS LEVEL PHYSICS PAPER 2 DOUBTS

    Wait.. can you explain this harmonic and frequency stuff a bit more? I don't get it.
  13. L

    Post Your AS LEVEL PHYSICS PAPER 2 DOUBTS

    http://www.xtremepapers.com/papers/CIE/Cambridge%20International%20A%20and%20AS%20Level/Physics%20%289702%29/9702_s10_qp_22.pdf Q4 (c) please.
  14. L

    Post Your AS LEVEL PHYSICS PAPER 2 DOUBTS

    Thanks a lot for the quick answers. One more if you don't mind: http://www.xtremepapers.com/papers/CIE/Cambridge%20International%20A%20and%20AS%20Level/Physics%20(9702)/9702_w08_qp_2.pdf Q6 (b) (i) and (ii) You don't need to tell me the whole experiment, just how it would be done.
  15. L

    Post Your AS LEVEL PHYSICS PAPER 2 DOUBTS

    The change ∆V in the volume V of some water when the pressure on the water increases by ∆p is given by the expression ∆p = 2.2 × 10^9 ∆V / V, where ∆p is measured in pascal. In many applications, water is assumed to be incompressible. By reference to the expression, justify this assumption...
  16. L

    Post Your AS LEVEL PHYSICS PAPER 2 DOUBTS

    How did you get the values of x2 and x1.. I don't get that part.
  17. L

    Post Your AS LEVEL PHYSICS PAPER 2 DOUBTS

    Actually meant part (c).. I made a typo there. :\ In any case, thanks for the quick reply. :)
  18. L

    Post Your AS LEVEL PHYSICS PAPER 2 DOUBTS

    http://www.xtremepapers.com/papers/CIE/Cambridge International A and AS Level/Physics (9702)/9702_s05_qp_2.pdf Q5 b (iii) http://www.xtremepapers.com/papers/CIE/Cambridge International A and AS Level/Physics (9702)/9702_s06_qp_2.pdf Q5 (c)
  19. L

    Physics: Post your doubts here!

    The question says "describe what is seen..", yes you do talk about the smoke particles, but since they appear as tiny, white specks of light you should mention that in the answer to that question since it's an observation. Likewise you would mention that the motion of these specks of light is...
  20. L

    Physics: Post your doubts here!

    because you do see tiny specks of light when viewing the particles through a microscope?
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