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  1. ousamah112

    A2 Physics | Post your doubts here

    i still didnt get it..:( can you put a sketch of it over here... and wht do you want to knw abt frquency modulation and sidebands?? p.s i dont knw much abt them too
  2. ousamah112

    A2 Physics | Post your doubts here

    walkum aslam. thanx nd wht abt that alternating voltage. how to draw on that graph???? jazak Allah
  3. ousamah112

    A2 Physics | Post your doubts here

    plz explain wo9 p41 q 6 b i and q7 b i n ii
  4. ousamah112

    A2 Physics | Post your doubts here

    wa eyyakum! :)
  5. ousamah112

    A2 Physics | Post your doubts here

    watch this
  6. ousamah112

    A2 Physics | Post your doubts here

    plz explain wo9 p41 q 6 b i and q7 b i n ii
  7. ousamah112

    A2 Physics | Post your doubts here

    why 12 - 4???:S
  8. ousamah112

    A2 Physics | Post your doubts here

    125oooo Hz for carrier frequency... btw how did you find frequency of signal wave???
  9. ousamah112

    A2 Physics | Post your doubts here

    plz explain wo9 p41 q 6 b i and q7 b i n ii
  10. ousamah112

    A2 Physics | Post your doubts here

    help me with may/june 09 p4 q6 part c..
  11. ousamah112

    A2 Physics | Post your doubts here

    not all the information is recovered when converted to analogue that's why it will not be a curve.
  12. ousamah112

    A2 Physics | Post your doubts here

    no its like this. i did in yellow.
  13. ousamah112

    A2 Physics | Post your doubts here

    rms speed at T= 300 is 500 to change rms speed into <c^2> square the rms speed so twice rms means = 4<c^2> we knw that <c^2> is directly proportional to T so T1/T2= <c^2>/4<c^2> put the values and you will get the answer.
  14. ousamah112

    Mathematics: Post your doubts here!

    http://www.xtremepapers.com/papers/CIE/Cambridge%20International%20A%20and%20AS%20Level/Mathematics%20(9709)/9709_w07_qp_4.pdf q6 last part.. plz someone upload a sketch.
  15. ousamah112

    A2 Physics | Post your doubts here

    help me with may/june 09 p4 q6 part c..
  16. ousamah112

    A2 Physics | Post your doubts here

    those soft organs absorb all or the ultrasound is completely transmitted without any reflection. For any image to be formed there must be some reflection at the boundary of that organ.
  17. ousamah112

    A2 Physics | Post your doubts here

    for square Irms= peak value and for sawtooth Irms=Io/3^1/2
  18. ousamah112

    A2 Physics | Post your doubts here

    because that Irms=Io/2^1/2 is only applicable to sine curve waves as it was derived from I=Iosinwt.
  19. ousamah112

    A2 Physics | Post your doubts here

    read applications from International A/As level Physics by hodder education. Writers: Chris Mee,mike crundell
  20. ousamah112

    A2 Physics | Post your doubts here

    because we assume that planets are of uniform density and its mass is concentrated at its centre. (i am not sure though_
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