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  1. Choi WW

    For physics practical question1

    For question 1, they usually ask us to do the experiment one time in the beginning, and then, they ask use to repeat the experiment unit we have 5 sets(( or centain amount given in the question) of reading, right? Is the 5 sets including the one set from the beginning of the question or except...
  2. Choi WW

    Physics: Post your doubts here!

    Oh, maybe that one can also be a factor. Thanks a lot.
  3. Choi WW

    Physics: Post your doubts here!

    However, for the question, D, which is answer has no position having zero intensity right?
  4. Choi WW

    Physics: Post your doubts here!

    But the answer is D, can you please explain me the reason why they don't have complete destructive interference (not zero intensity)?
  5. Choi WW

    Physics: Post your doubts here!

    The answer is D so I thought it's because there is the difference in the path travelled by the waves, so there is difference in intensities, amplitudes of the waves, so there would be no complete destructive interference. But then, for the young's double slit experiment, there should be also no...
  6. Choi WW

    Physics AS paper2 , rounding up...

    Thanks, a lot ^^
  7. Choi WW

    Physics: Post your doubts here!

    About rounding up in AS physics paper 2.... There are a lot of calculation questions in physics, right? Also, there are many parts in each questions, and some of them are continuous, so we have to use the answer of the previous answer. For that case, the result is sometimes different from the...
  8. Choi WW

    Physics AS paper2 , rounding up...

    There are a lot of calculation questions in physics, right? Also, there are many parts in each questions, and some of them are continuous, so we have to use the answer of the previous answer. For that case, the result is sometimes different from the marking scheme due to rounding up from the...
  9. Choi WW

    chem practical 33

    OH..... Did anyone's solution change? I don't want to be alone.....
  10. Choi WW

    chem practical 33

    For the last question of q3(conclusion part), did you guys' solution turn brown with nh3 or naoh(oxidised)?
  11. Choi WW

    9231/01/m/j/08 question 10

    Can someone explain me the second part, sigma (2n-1)sin((2n-1)pi/N)?
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