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  1. selrey

    Mathematics: Post your doubts here!

    Does anyone know any site where i could find the solved past paper for p3 and s1?
  2. selrey

    Physics: Post your doubts here!

    Ughhh i messed up the gradient expression. Do i get an ecf in the other parts? ;-;
  3. selrey

    Physics: Post your doubts here!

    Does anyone remember the equation for Q2 p5? And what was the expression for gradient?
  4. selrey

    A level Biology: Post your doubts here!

    Hi just wondering what y'all think will be the threshold for A in p4? :p Also any tips for quick revision for p5?
  5. selrey

    Physics: Post your doubts here!

    Oh godd lets hope not xD cos paper was easy but i made alotttt of silly mistakes ugh
  6. selrey

    Physics: Post your doubts here!

    Oct/nov exams usually have higher gt as compared to may/june and I believe that's because fewer students appear in oct than in may...
  7. selrey

    Physics: Post your doubts here!

    I like how youre worried over 1 mark and then theres me who fkd up the whole freaking q1 (which was quite easy, yes ik) and still chilling out xD
  8. selrey

    Physics: Post your doubts here!

    They are asking for work done from mid point of AB to point P. Charges are same on both spheres and the distance as well ie 6um from both A and B to midpoint. At a point the total potential experienced by the e is equal to sum of potentials from both A and B charges to that point. Thus at point...
  9. selrey

    Physics: Post your doubts here!

    Ohhh right. Lmao i feel so dumb xD
  10. selrey

    Physics: Post your doubts here!

    Thank youuu so much! Also in part 1 the ms say that Vmin should be at 4 V. Like ik how the shape should be but how do we find the Vmin the graph should fall to?
  11. selrey

    Physics: Post your doubts here!

    From the graph R=2.5 cm. As V is constant inside a sphere
  12. selrey

    Physics: Post your doubts here!

    Considering the statement given in bracket, maybe it has to do something with whether at t=0 the displacement is max or 0. Otherwise we can use any of these. Just that if there's a part in qs which requires an eq for velocity, we will use the derivative of the eq we used for displacement. Like...
  13. selrey

    Physics: Post your doubts here!

    Can someone please explain part (c)?
  14. selrey

    Chemistry: Post your doubts here!

    Can someone explain Q2) a) i) for [H+]?
  15. selrey

    Chemistry: Post your doubts here!

    What do you guys think is the expected grade for Chem p1? Paper was easy but i made some silly mistakes sigh:cry:
  16. selrey

    Physics: Post your doubts here!

    Ohh thankyou!
  17. selrey

    Physics: Post your doubts here!

    A giant squid of length 20.0m is vertical in seawater, with the top of the squid at a depth of 8.00m. The density of seawater is 1050kgm–3. What is the difference in pressure between the top and the bottom of the squid? A 82000Pa B 206000Pa C 288000Pa D 389000Pa Anyone?
  18. selrey

    Physics: Post your doubts here!

    Yupp 4 grids when you find the time for the whole wavelenght and 2 grids for time b/w X and Y yunno:p
  19. selrey

    Physics: Post your doubts here!

    You'll take the distance between XY = 1/2 wavelenght. Then find frequency and the time period afterwards. You'll get T=1ms which is two 2 grids on the CRO
  20. selrey

    Physics: Post your doubts here!

    Ans?
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