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  1. Minsa Fatima

    Chemistry: Post your doubts here!

    ethanedioic acid is furhter oxidised to Co2 and H2o.no?
  2. Minsa Fatima

    A level Biology: Post your doubts here!

    thats why we use water to absorb high or low heat as the distance is changed and temp is kept constant
  3. Minsa Fatima

    A level Biology: Post your doubts here!

    it is to keep the heat from source constant (to standardise this variable)
  4. Minsa Fatima

    Chemistry: Post your doubts here!

    I dont think this is the case. It would still show optical isomerism.
  5. Minsa Fatima

    Chemistry: Post your doubts here!

    How do we come to know where to place the Cl and NH3? Cant there be any other arrangement apart from these?
  6. Minsa Fatima

    Physics: Post your doubts here!

    with 180 degree phase differene. it was mentioned in a mark scheme of a previous paper
  7. Minsa Fatima

    Physics: Post your doubts here!

    just 1
  8. Minsa Fatima

    Physics: Post your doubts here!

    then I guess that would be correct
  9. Minsa Fatima

    Physics: Post your doubts here!

    why tho. you just lost 6-7 marks
  10. Minsa Fatima

    Physics: Post your doubts here!

    I think there wasnt much differemce although I made a few silly mistakes. What about you?
  11. Minsa Fatima

    Physics: Post your doubts here!

    The change could be say, 0-12= -12 or 0-(-12)=12 so change could be either -ve and +ve. no?
  12. Minsa Fatima

    Physics: Post your doubts here!

    IN the application booklet it is the range of frequencies occupied by a waveform. It would be the difference in max and min frequencies. As for the other you might lose a mark for not explaining why there was no temp change
  13. Minsa Fatima

    Physics: Post your doubts here!

    If we consider sign of B and put it in formula that we used before to prove the voltage wont we get a negative value of voltage? Are u sure your friends did it the right way?
  14. Minsa Fatima

    Physics: Post your doubts here!

    Idk but over there values of B are GREATER THAN Zero only. There arent any -ve values as were in our paper
  15. Minsa Fatima

    Physics: Post your doubts here!

    we had to explain it as well.
  16. Minsa Fatima

    Physics: Post your doubts here!

    The gradient was in the same direction but one line was passing through positive values of B and other through -ve. So wont they be in opposite directions? Does sign of B make any difference?
  17. Minsa Fatima

    Chemistry: Post your doubts here!

    we need to work them out using the info given
  18. Minsa Fatima

    Chemistry: Post your doubts here!

    2 mol Mg+2 reacts with 1 mol HCoo- so 0.051/2 initial conc 50 times the diluted so *50
  19. Minsa Fatima

    A level Biology: Post your doubts here!

    They have a variable region with antigen binding site so can cause agglutination of antigns/pathogens or may result in opsonisation or act as antitoxins
  20. Minsa Fatima

    Physics: Post your doubts here!

    For J08 P5 Q2 d why won't we include s^-1 in the units
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