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  1. M

    Physics: Post your doubts here!

    These were two separate questions or at least I'm referring to separate ones in my answer above lol. The first one was the object falling height h1 then bouncing back up to h2 so what was change in momentum. Change in momemtum is final momemtum - initial momemtum, but since the velocities will...
  2. M

    Physics: Post your doubts here!

    If you're absolutely sure then you're right. :D
  3. M

    Physics: Post your doubts here!

    It was A vs. C and then A cause C implied a greater final velocity than initial but that's impossible since no input from any force and mgh was the same as it came back to same height as it initially had, so had to be A.
  4. M

    Physics: Post your doubts here!

    3.5 means 3 whole maximas. The 0.5 won't count. But that 3 whole means on 90 degrees in top half. So you x2 = 6 total maximas at angles, and 1 central at 0 angle which you have to count anyway so 7.
  5. M

    Physics: Post your doubts here!

    Ah darn it I know I know idk what I did lol I did a similar question that bothered my friends yesterday without any problem dunno what happened in the paper. Lol
  6. M

    Physics: Post your doubts here!

    8 3.5 in top half 3.5 in bottom half = 7 + 1 central = 8
  7. M

    Physics: Post your doubts here!

    LOL I chose D. I hope it's correct. It would be if: 1. Zaki doesn't remember right and W was just the weight as in the 2015 question 2. Option D said 'force on Earth from book"
  8. M

    Physics: Post your doubts here!

    Ah okay you sure? In that case I'm wrong.
  9. M

    Physics: Post your doubts here!

    Guys lol is it cool we discussing answers? I'll give my input for the ones you mentioned: First question B for certian, every 'smart' kid I know chose B lol, I happened to choose that too. ------------------------------------------------------------------------------------ Q9 table is similar...
  10. M

    Physics: Post your doubts here!

    Oh darn. Many others ik found it to be difficult and awkward too. Shouldnt be more than 30 for an A. And overall physics is lower than others like chem and bio so dont worry if your other phy papers went well. :)
  11. M

    Physics: Post your doubts here!

    How did it go guys? Mine was pretty good. It was a nice interesting paper, a bit weird perhaps. I noticed this year in P2 and P1 they seemed to focus more on units and definitions such that they even included derivation in p1 o_o Overall it was nice. Expecting 35 and above. For sure got 2 wrong...
  12. M

    Physics: Post your doubts here!

    Nice username. Sum of vertical upwards momentum = sum of vertical downwards momentum, and sum of horizontal rightwards momentum = sum of horizontal leftwards momemtum. Using the vertical one, total downwards momentum at end is (0.1)(8.0) = 0.8 N s So total upwards momentum should be equal to...
  13. M

    Physics: Post your doubts here!

    So beautiful. :')
  14. M

    Physics: Post your doubts here!

    Q31: V = IR (Voltage = Current / Resistance) R = pL/A (Resistance = Resistivity x Length / Area) Thus, V = IpL/A (Voltage = Current x Resistivity x Length / Area) I = VA/pL (Current = Voltage x Area / Resistivity x Length) V is the same, p is the same, L is the same. A is directly...
  15. M

    Physics: Post your doubts here!

    They are asking for a hypothetical relationship, a "possible relationship" as they say. You know that Power depends on v and F, and F depends on v. So power depends on v twice as much as F depends on v. Thus, in a potential relationshiip, the dependence of Power on v must be one exponent higher...
  16. M

    Chemistry: Post your doubts here!

    We will brother inshaAllah you'll do great! :D All the best!
  17. M

    Chemistry: Post your doubts here!

    Ik man very frustrating realization, stupid mistakes like misreading the question or not reading it carefully *facepalm* nothing I got wrong so far was a conceptual mistake, all due to nonesense mistakes.
  18. M

    Chemistry: Post your doubts here!

    35-37, it was nice. :D made some very silly mistakes or else it would be 37-40.
  19. M

    Chemistry: Post your doubts here!

    Of course, I only said that because it's AS tomorrow and didn't want to confuse the target audience who will be giving P1 tomorrow while entropy is part of the A2 syllabus so I'm sure CIE won't ask any questions that would relate to that area. But yes what you said is absolutely true. :D
  20. M

    Chemistry: Post your doubts here!

    Haha no, thanks, it makes sense. :)
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