Oxford PAT 2016, Question 16



6 thoughts on “Oxford PAT 2016, Question 16

  1. Hi there! May i suggest an adjustment be made?
    on the last part of the answer, you can separate the denominator into two variables which are (1-k^(1/2)) and (1+k^(1/2)).
    by doing this, you can cancel off the numerator. doesnt do much but it shows a clearer answer. well at least for me it does 🙂

    1. No worries, it’s a pleasure to answer your questions.

      Yes, it would be absolutely fine to express the position in terms of e.g. the value Q1/Q2. In fact that’s just what k represents (well, 1/k actually, but …).

    1. That’s a good question, that isn’t easy to answer. Basically I did this because it meant that the Q1 and Q2 values could be cancelled out of the equation in line 2, to give us an equation relating r to the ratio k (which I have defined to be Q1/Q2). Just makes the algebra a bit simpler.

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