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Physics: Post your doubts here!

Discussion in 'International A And AS Level' started by XPFMember, Sep 29, 2011.

  1. hellodjfos;s'ff

    hellodjfos;s'ff

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    Thanks brada
     
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  3. Fardeen3342

    Fardeen3342

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    do you have feb march 2018 for chem p4 and physics p5 please post it
     
  4. angryrider_56

    angryrider_56

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    nah fam...i dont take chem so i didnt really search for it but if i encounter it, ill send asap.
     
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  5. Fardeen3342

    Fardeen3342

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    thank you so much
     
  6. GarryTheGhost

    GarryTheGhost

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    can anyone please show me a simple circuit on how i would measure the intensity of the sound wave reflected back, i tried to draw this but in 10 min but i dont know if this is right or wrong.
     

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  7. Sijanshrestha

    Sijanshrestha

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    Any prediction for tomorrow's paper 52???
     
  8. Holmes

    Holmes

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  9. xoxoxoxo123276

    xoxoxoxo123276

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    Does anyone have the feb March 2018 for physics 9702 p22?
     
  10. xoxoxoxo123276

    xoxoxoxo123276

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    The link isn't working can you send for google drive?
     
  11. Kanekii

    Kanekii

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    Can someone help me in Q2 part 5 of this paper m/18 phy 22
    Thanks :D
     
  12. Ebrahim12

    Ebrahim12

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    Δp = p2 - p
    Rearranging gives:

    Δp + p1 = p2

    We know from the diagram the angle between p1 and p2.

    The vector diagram:
    upload_2018-5-17_15-5-7.png
    You can use Pythagoras's theorem to find Δp.
     
    Last edited: May 18, 2018
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  13. Kanekii

    Kanekii

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    Oh i see now tsym
     
  14. Jihoo Lee

    Jihoo Lee

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    Anyone can tell me the s.fs of paper 2?? 2 or 3 s.fs? ;( and good luck on your tmr's exam!
     
  15. Krypton36

    Krypton36

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    I guess it’ll be something from magnetism!
     
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  16. GarryTheGhost

    GarryTheGhost

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    what makes you think that?
     
  17. Kanekii

    Kanekii

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    Its usually 3 but its always stated at the front page of the the exam under instructions. Also for some questions they specify how many significant figures
     
  18. Sijanshrestha

    Sijanshrestha

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    Hello, can anyone please help me with the figure of question no. 1 of paper 52 of Feb/March 2018????
     
  19. Sijanshrestha

    Sijanshrestha

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    How did you know that?
     
  20. Ebrahim12

    Ebrahim12

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    In the final answer you should use the same number of sigfigs as the value with the smallest number of sigfigs in your calculation.

    Example:

    m = 1.90 kg (3sf)
    v = 2.3 ms^-1 (2sf)

    The kinetic energy here should have 2sf.
     
  21. Jihoo Lee

    Jihoo Lee

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    Got it. if the previous question is "show that~", should I use that value in the question or the value I calculated in more s.f ?
     

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