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  1. C

    Circular Motion

    20 rev/min = 20/60 rev/sec = 1/3 Now 1 rev = 2pi So 20 rev/min = 1/3 * 2pi = (2pi)/3 rad/s
  2. C

    Non-accelerated students?

    I reckon it's worth doing the exercises "Revisions of the entire course" in the back of the 3U Coroneos book. After all, it appears that an induction question was taken from there for this year's Ext 1 HSC exam.
  3. C

    How many days off did you have?

    How sensitive of you... Obviously I would've had a medical condition. Not all people are healthy like you.
  4. C

    inequalities with x in the denominator

    A bad teacher may've been a contributing factor. I would know... this same teacher taught me for Extension 2... hahaha
  5. C

    inequalities with x in the denominator

    Well, you're forgetting that x =/= 2/5 since it's just a ">" (no equality). You answer however would be correct if it was "greater than or equal to".
  7. C

    inequalities with x in the denominator

    ?? That is the case method. By definition, |x+1| = x+1 if x+1>= 0 Therefore x>-1 and |x+1|=-(x+1) if (x+1)<0, therefore x>-1 etc
  8. C

    chem question

    That would be because textbooks often contain 3-4 option modules.
  9. C

    Raw Marks and Test Papers in the Mail Today

    I got similar marks for Chem and English... Great... that means I just passed those exams -_-;
  10. C

    inequalities with x in the denominator

    But for some other types you need to use the case method. Eg. |5x-2|/x > 0 or |x+1| + |2x-1| < 5
  11. C

    Integration Question

    Knowing implicit differentiation I reckon can help in 3U, especially if you get something nasty like that in this year's 3U HSC.
  13. C

    inequalities with x in the denominator

    Could also use the case method... although it appears that alot of people don't get it. I remember in Year 11 the teacher of another class taught this method to his students. Only one of them (out of 30) got it in the test, whereas in our class everyone got the correct answer using the above...
  14. C

    Projectile motion problem

    Sx = (u^2 sin2θ) / g 7 = u^2 sin30deg / 9.8 so u=12m/s (approximately) I didn't use a calculator so I may be a bit off.
  15. C

    2009 HSC Raw Marks

    How do I apply for my raw marks? I was on holiday for 2 weeks, so what did I miss?
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    I think I passed. That is, English - 50+ Chemistry - 50+ MX1 - 50+ MX2 - 50+ Physics - 50+...

    I think I passed. That is, English - 50+ Chemistry - 50+ MX1 - 50+ MX2 - 50+ Physics - 50+ Next year? Might join a band and go on tour :D
  17. C

    I think I passed.

    I think I passed.
  19. C

    Are there any aspects of 2 Unit that won't be tested in the 3 Unit exam?

    Nah, I think the length of the Ext 1 paper is good. It's a nice "novice separator". Also, I don't think the length of the 2U paper should be shortened only because in other 2U subjects like Physics you get a ridiculous amount of time IMO. I mean, I deliberately took my time and finished the...
  20. C

    Japanese Textbooks?

    The poster has deleted her post (in shame probably). But dw, I know who she is ;)
  21. C

    Favourite conic sectionw

    Parabola -- Easy XD
  22. C

    Wait, I got it! YES! No, wait I didn't... Cambridge Question Help again

    It is worth noting that they don't really ask these types of questions in the HSC. But of course it is worth having a look at it.
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