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  1. S

    How was 9702 w42?

    The op amp was used as a comparator.simply to compare the temperature
  2. S

    How was 9702 w42?

    U found the potential acrossthe first resistor. That is the potential used by it which was 3.5. Subtract it from 6 to find the potential remaining. Thst will be 2.5 and potential at b
  3. S

    How was 9702 w42?

    I got 16 as well
  4. S

    How was 9702 w42?

    by using potential divider formula. At b it was resistance of lower in parallel it was 3 maybe divided by total and multiply by 6.
  5. S

    How was 9702 w42?

    Tbe op amp part was easy. U had to find potentials which i vot 2.5 and 3.178. In forces i wrote constant increase increase decrease
  6. S

    9702_w15_qp_42 ?? (Physics Paper 4)

    Mine was ok what about u?
  7. S

    How was 9701_p42 chemistry

    how did u get +2000. Lattice energy can never be positive. I got around -1975 maybe. Anyother answers anyone remembers.
  8. S

    Chemistry MCQ thread...

    Thanks
  9. S

    Chemistry MCQ thread...

    Why is the the third option not corect? Q 31. Please reply. Thanks
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