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  1. Suchal Riaz

    and when i think of old times i start to cry like this: :''''D

    and when i think of old times i start to cry like this: :''''D
  2. Suchal Riaz

    don't you agree to what i said though?

    don't you agree to what i said though?
  3. Suchal Riaz

    which head :P

    which head :P
  4. Suchal Riaz

    Physics: Post your doubts here!

    for smallest case there is only one node and antinode so: distance b/w antinode and node is 1/4 λ
  5. Suchal Riaz

    Physics: Post your doubts here!

    at lowest frequency the first harmonic is made which is 1/4 λ in case of closed pipe so L=1/4 λ so λ=4L you can't make a wave smaller than this because there must be a node at closed end and antinode at open end
  6. Suchal Riaz

    Physics: Post your doubts here!

    the first one is stationary and second one is progressive
  7. Suchal Riaz

    Physics: Post your doubts here!

  8. Suchal Riaz

    Physics: Post your doubts here!

    draw a straight line like this:
  9. Suchal Riaz

    Physics: Post your doubts here!

    after 1/4 T the wave will be a straight line. to see why the antinodes go back to their original position(complete one oscilation in one T) so in 1/4th they complete 1/4th of their oscillation. which is from max to zero, then from zero to min, then from min to zero then from zero to max.
  10. Suchal Riaz

    Physics: Post your doubts here!

    it depends on the marks though. i have only seen energy converted into electric form of energy when in columb of charge passes through complete loop in markschemes
  11. Suchal Riaz

    Physics: Post your doubts here!

    resistivity = R A/L = 7.5* pi r² / 1.75 m = 7.5* pi (0.38 e -3 /2)² / 1.75 m = 4.86e-7 in this curly d(somthing)/something = percentage uncertainty so dp/p = 3/1750 + 2*0.01/0.38+0.2/7.5 * 100= 8.13% dp = 8.13% * 4.86e-7 = 0.395e-7 in this e is shortcut for writing X10^
  12. Suchal Riaz

    Physics: Post your doubts here!

    in this diagram the seperation of lines represent how weak the strength is. when the lines are almost parallel as well as the distance is same they are uniform. so by diagram they are uniform at centre of rod. and decreasing means the lines are spreading aways(their distance increase).
  13. Suchal Riaz

    if you are still awake i will answer them otherwise there is no benefit of doing it.

    if you are still awake i will answer them otherwise there is no benefit of doing it.
  14. Suchal Riaz

    Physics: Post your doubts here!

    now i am tired and i am going away bye :'(
  15. Suchal Riaz

    Physics: Post your doubts here!

    (a): f=ke energy = work done = average force * distance = 1/2 (F) * e =1/2 fe but f=ke so =1/2 ke² (b) each small block represent energy = 2N * 2 x 10^-5 m = 4 x 10^-5 J count small boxex(put a dot in the one you have counted) and then multiply them by 4 x 10^-5
  16. Suchal Riaz

    Physics: Post your doubts here!

    post link. everyone posts link to get their question answered.
  17. Suchal Riaz

    Physics: Post your doubts here!

    idk the 2013 papers were easy as well as P1 of this year. but chemistry was different. and mechanics was difficult too. but i still hope it is easy.
  18. Suchal Riaz

    Physics: Post your doubts here!

    current = charge/time charge of an alpha particle = +4e number of alph particle = n total charge = n4e current = 1.5 x 10 -12 so 1.5 x 10 -12 = 4ne/1 second n=(1.5 x 10 -12)/4e = (1.5 x 10 -12)/4(1.6x10 -19) = 2.34 X 10 6
  19. Suchal Riaz

    Physics: Post your doubts here!

    by conservation of energy the height of mass will be the same. the height at A is 0.26 so height at second plank will be 0.26 m height is 0.26, angle is 30 so the length = 0.26/sin30
  20. Suchal Riaz

    Physics: Post your doubts here!

    https://www.xtremepapers.com/community/threads/physics-post-your-doubts-here.9860/page-451#post-784558
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