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  1. N

    Space question

    Explain the changes in momentum when a satellite fires its propulsion system (3 marks) This is from the 2008 HSC. When answering this question do I refer to the law of conservation of momentum and how in a closed system interaction, the momentum is always unchanged. So when the propulsion is...
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    Parametrics question

    Im having problems with question 4 part ii part alpha. The answers just say if y=a. Then pq=1 Thanks for any help
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    What TV shows can you absolutely not miss?

    Breaking Bad!!!
  4. N

    Moving about question

    thanks! LOL sorry didn't know about the rep system, haven't been on BoS in a while.
  5. N

    Moving about question

    A 50Kg man climbs to the top of a bungee jump platform, exactly 100m above a river. he is securely attached to a rubber bungee rope. The man leaps off the platform. He free falls for 50m and then the bungee rope stretches a further 50m, stopping the man safely, just above the river. a)...
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    SHM question

    Oh ok, forgot about that! I'm new to this. Thanks!
  7. N

    SHM question

    bump.
  8. N

    SHM question

    A particle executes simple harmonic motion. When it is 2cm from its equilibrium position, its velocity is 6cm/s; when it is 3cm, its velocity is 4cm/s. Find the period of its motion and the amplitude. Thanks! Any help will be repped.
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    Game of Thrones

    If you have the time i'd recommend reading the books. I hardly read books, but this series is just too good. has to be the best of its genre.
  10. N

    Game of Thrones

    ^Gotta love joffrey's cowardice when it comes to a real fight. All words.
  11. N

    Physical applications of calculus question

    Thanks man! Really helped.
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    Does anyone have past papers?

    Try this website, *******.org
  13. N

    Physical applications of calculus question

    Two Straight roads meet at an angle of 60 degrees. Car A starts from the intersection and travels along one road at 40km/h. one hour later Car B starts from the intersection and travels along the other road at 50 km/h. At what rate is the distance between them changing three hours after Car A...
  14. N

    Should assassination be a legitimate foreign policy tool?

    http://en.wikipedia.org/wiki/Execution_of_Saddam_Hussein
  15. N

    Should assassination be a legitimate foreign policy tool?

    No he was caught by the US and then they handed him over to the Iraqis. They gave him a trial and he was sentenced to death. So he was executed not assassinated.
  16. N

    Parametric equations question

    Thanks barbernator! After looking at your solution I realised I made a stupid mistake in my method. Thanks again.
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    Parametric equations question

    Well, For the co-ordinates of R I got [3a(t-s),3ast]. Does that seem right barbenator? For some reason the book doesn't have the answers for the co-ordinate part.
  18. N

    Parametric equations question

    When I find the equation of the normals. they both have s and t in them. I couldn't eliminate them. So i can't solve them simultaneously. Am I supposed to use the second part of the question for this. Where st=-2?
  19. N

    Parametric equations question

    The normals to the parabola x^2=4ay at the point P(2at,at^2) and Q(2as,as^2) meet at R. Find the co-ordinates of R in terms of t and s. If st=-2, find the cartesian equation of the locus of R I've been stuck on this for quite a while. Any help would be appreciated.
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