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Recent content by Ebrahim12

  1. E

    CIE Results

    Got 3A* in AL Congrats everyone
  2. E

    Mathematics: Post your doubts here!

    Yeah time was tight for me too Don't know/think I did anything wrong and I just need to lose less than 8 marks for a star even with high grade boundaries Hate it when they pull the vague answers in the ms, why even bother at that point
  3. E

    Mathematics: Post your doubts here!

    Welp, finally done with my exams. Anyone else did 32 today?
  4. E

    Physics: Post your doubts here!

    You are talking about I₀ here? it would be the incident wave, ie the wave produced by the speaker not the one reflected by the wall
  5. E

    Mathematics: Post your doubts here!

    Ouch sorry man Thing is I did check if they were arranged but I guess I did that wrong? lol
  6. E

    Mathematics: Post your doubts here!

    No way....**** my life
  7. E

    Chemistry: Post your doubts here!

    First time seeing reduced pressure filtration in march 19, anyone have a list of procedures we should know?
  8. E

    Physics: Post your doubts here!

    The equation depends on how you define the terms: (generally these two are constant) U is increase in internal energy q is heat supplied to system If w is work done on system, then: U = q + w If w is work done by the system, then: U = q - w Think of how the work changes the internal energy...
  9. E

    Physics: Post your doubts here!

    Is the ms for march 19 out?
  10. E

    Physics: Post your doubts here!

    Anyone have a list of common circuits or something to answer these questions?
  11. E

    Physics: Post your doubts here!

    You should link or screen shot the entire question. Anyways: The blue graph is the load voltage with the full bridge rectifier but without the capacitor The red graph is with the capacitor added, minimum voltage of 3v
  12. E

    Physics: Post your doubts here!

    Can someone mark the direction of the back emf generated by the relay here?
  13. E

    Chemistry: Post your doubts here!

    Did 41 Nmr CH3CH2OCH2COCH3 Vap 31
  14. E

    Chemistry: Post your doubts here!

    If the molecule only had one primary and one tertiary H atoms, the ratio would be 21:1, but since there are 9 primary H atoms for every one tertiary, that increases its relative rate by 9 times, 21:9.
  15. E

    Chemistry: Post your doubts here!

    Al2O3 is a reducing/dehydrating agent, so it wouldn't react. We only have oxidation of alkyl benzene by KMnO4, so you have to say no reaction.
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