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  1. G

    Physics: Post your doubts here!

    do you convert the units to SI units as well. like march 2018 question 2 last question. w is in mm and so is lamda do we convert it into meter? my lamda was 2.6x10^-4 mm should i do (2.6x10^-4)x10-3????
  2. G

    Physics: Post your doubts here!

    it could be anything, all the 52 papers are like mechanics didn't see any electric questions in 52 after 2016???
  3. G

    Physics: Post your doubts here!

    should i do question 2 or 1 first in paper 5
  4. G

    Physics: Post your doubts here!

    what makes you think that?
  5. G

    Physics: Post your doubts here!

    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.
  6. G

    Physics: Post your doubts here!

    how would i draw the relay
  7. G

    Physics: Post your doubts here!

    someone please help
  8. G

    Physics: Post your doubts here!

    can someone please explain how to do this question; the markscheme did total attnetuation + signal to noise power ratio but i thought i could do it this way: what i did: total attenuation: 84*0.19=16dB -16=10log(signal output power/signal input power) -16=10log(signal output power/9.7*10^3)...
  9. G

    Physics: Post your doubts here!

    (a)= 2.6*10^-17N i need help in part (c) why did they multiply the the charge of point A BY 2? is it becuz they are also considering point B? but then why isn't the distance 12 micrometers instead of 6? since the separation is 12. how did they calculate the second line of the markscheme?
  10. G

    Is A level 2018 March papers released

    i need physics 9702 for feb march anyone?
  11. G

    nooooo dont go i still need help for physics :c

    nooooo dont go i still need help for physics :c
  12. G

    Physics: Post your doubts here!

    and obviously the second graph would be the 1/x curve hence not touching the axis since the denominator would never = 0 thank you very much for you help.
  13. G

    Physics: Post your doubts here!

    ah yes sorry my mistake sorry. λ=h/mv not E=h/mv
  14. G

    Physics: Post your doubts here!

    assuming the first picture looks more like a curve.... is that correct? also for the second part its the graph of λ against momentum since E proportional 1/λ and E proportional 1/p hence P directly proportional to λ hence a straight line???? Thats how i see it please correct lol.
  15. G

    Physics: Post your doubts here!

    ahhh yes thought so, thank you for the clarification.
  16. G

    Physics: Post your doubts here!

    again with these graphs dont know how i should practice them :c, the only mistakes i'm making in the whole paper and like 70% worth of the paper is graphs lol..... can someone explain why is it a negative gradient???? threshold frequency is the minimum frequency required to release an...
  17. G

    Physics: Post your doubts here!

    lol just finished that paper do u have any idea how would i do question 6ii
  18. G

    Physics: Post your doubts here!

    Can anyone tell me when to use which equation, like what are the situations or scenarios to use each equation. this is for SHM
  19. G

    Physics: Post your doubts here!

    june 2017 42. still dont know why we have to include the 56 and its worth one mark..... 56 is the nucleon number for iron both La and U-236 have a greater nucleon number. y include it in the answer
  20. G

    Physics: Post your doubts here!

    for part c it says the A=56 where did they get that from? binding energy for La was (7.85Mev)
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