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Physics Quiz 3-24-13 Results

  1. Mar 24, 2013 #1

    Evo

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    Awesome quiz!

    Thank you ZapperZ for putting this together.

    We had an awesome group of participants, and this was a HARD quiz! Questions carried a different number of points depending on the difficulty.

    The winner with a total of 12 points was Ryuzaki!!! Way to go!!

    Our newest member, phys_12 answered the most questions correctly, with 7.

    Points awarded

    Ryuzaki - 12
    phys_12 - 9
    trollcast - 6
    Jonathan Scott - 4
    Darth Frodo - 2
    HS-Science - 1

    Congratulations to all!!!!!
     
    Last edited: Mar 24, 2013
  2. jcsd
  3. Mar 24, 2013 #2
    Congrats everyone! Nice work ZapperZ!

    6 months Gold membership for Ryuzaki!
     
  4. Mar 24, 2013 #3

    mfb

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    2016 Award

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    Is it possible to see the questions somewhere?
     
  5. Mar 24, 2013 #4

    Borek

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    Zz promised to post them with solutions later.
     
  6. Mar 24, 2013 #5

    OmCheeto

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    I saved the last one, as I should know the answer.

    It's making me a bit crazy.

    (I'm blaming my flu for being able to answer only one question, and those darn Neutrino kids for welching me out of my one point by answering it before ZZ even posted the question.... Curses to this new FTL generation!!!!! :grumpy:)

     
  7. Mar 24, 2013 #6

    Vanadium 50

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    Hint: plot it.
     
  8. Mar 24, 2013 #7

    OmCheeto

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    it's non-linear. The plot is supposed to be linear.

    Therefore the data is bogus.

    I believe that was what Zapper was trying to tell us.

     
  9. Mar 24, 2013 #8

    ZapperZ

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    The data isn't bogus. Data is data. It is the analysis that isn't valid. It is trying to make the data to conform to something which it isn't, which is a straight line.

    Zz.
     
  10. Mar 25, 2013 #9

    Jonathan Scott

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    I enjoyed the quiz. I got caught out by the one about the motor boat and the raft. If I'd been properly awake, I'd have applied Galilean relativity and written the answer down immediately.
     
  11. Mar 25, 2013 #10

    Borek

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    I had problems because of the wording (not Zz's fault, but limitations of my English). Up to now for me "after a while" meant "after a SHORT period of time" (something like a moment). Apparently it means "any period of time of unspecified length".

    I never know when, where and why my English will blow.
     
  12. Mar 29, 2013 #11
    Thanks, Evo and Greg! It was an awesome quiz. Had me on the edge throughout. Absolutely loved it! :D Can't wait for the next one, ZapperZ! ;)
     
  13. Mar 30, 2013 #12

    Redbelly98

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    You're making an assumption that isn't necessarily true.

    Question to ponder: would you expect the temperature of the resistor to change, as the current and voltage are increased?
     
    Last edited: Mar 30, 2013
  14. Mar 30, 2013 #13

    OmCheeto

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    I don't think I have a 40 watt resistor in the house. Unless of course you count my 40 watt antique warming globe.

    But yes, of course the temperature will rise, with real world consequences.

    And I think the question caught me off guard, as in my 40 years of electrical experience, I've never measured resistance in such a manner. I always use an ohmmeter.

    But I think Zappers ultimate point was that you shouldn't blindly plug data into a piece of software without looking at the data, to see if the software's output really makes sense.

    -----------------------------
    And now I have to go figure out why two of the four cylinders on my outboard are not firing. There are two coils, and two sets of points. The two cylinders that are not firing are fed by one coil and one set of points. Time to take off the flywheel!
    It's going to be 70+ degrees today, and I have a date with a lady friend and the river. :smile:
     
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