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July 21, 2025, 09:55:02 pm
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Author Topic: Detailed Studies?  (Read 4822 times)  Share 

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Shark 774

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Detailed Studies?
« on: June 16, 2011, 07:34:08 pm »
What did you guys think of your detailed study? My teacher said that structures and materials was ridiculously easy. I did relativity and thought it was at least twice as hard as it had ever been before, although still do-able.
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sam23z

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Re: Detailed Studies?
« Reply #1 on: June 16, 2011, 07:59:18 pm »
How did you do relativity question 9? wouldn't you need to know the dilated time first?
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ttn

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Re: Detailed Studies?
« Reply #2 on: June 16, 2011, 08:00:43 pm »
Further Electronics was fairly easy. 
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b^3

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Re: Detailed Studies?
« Reply #3 on: June 16, 2011, 08:08:49 pm »
yeh it was, except for one question which I had to guess, otherwise similar to previous years.
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Shark 774

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Re: Detailed Studies?
« Reply #4 on: June 16, 2011, 09:10:21 pm »
Quote from: sam23z on June 16, 2011, 07:59:18 pm
How did you do relativity question 9? wouldn't you need to know the dilated time first?

You work out the time that the scientists observe by using t = x/v and then find the proper time using the lorentz transformation.
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sam23z

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Re: Detailed Studies?
« Reply #5 on: June 16, 2011, 09:21:37 pm »
oh...that's a lot easier than I thought, thanks
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ttn

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Re: Detailed Studies?
« Reply #6 on: June 16, 2011, 09:48:12 pm »
Quote from: b^3 on June 16, 2011, 08:08:49 pm
yeh it was, except for one question which I had to guess, otherwise similar to previous years.

Which qn was this? Only qn I stuffed up was not noticing the 5.5V zener diode was in forward bias and therefore Vout would not be the 5.5V flat line.
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FromBaghdadWithLove

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Re: Detailed Studies?
« Reply #7 on: June 16, 2011, 09:58:21 pm »
structures and materials, was NOT easy at all...
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b^3

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Re: Detailed Studies?
« Reply #8 on: June 16, 2011, 11:01:51 pm »
the last one, i think i subed in the wrong value and got an answer in between two choices. what did you get for that q12)?
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GuessWho

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Re: Detailed Studies?
« Reply #9 on: June 16, 2011, 11:05:58 pm »
I put down C. Which was 1.6M. What did you get?
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b^3

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Re: Detailed Studies?
« Reply #10 on: June 16, 2011, 11:09:48 pm »
i think i ended up getting the 1.0Mohm but I'm preety sure im wrong.
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GuessWho

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Re: Detailed Studies?
« Reply #11 on: June 16, 2011, 11:14:08 pm »
I don't know if I'm right but I used the formula t=RC and got R=2600000 and since the equipment and resistor were in series I assumed that that resistance was the combined of the two, so I just subtracted 1000000 from that and got 1.6M
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ttn

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Re: Detailed Studies?
« Reply #12 on: June 16, 2011, 11:25:22 pm »
i chose D. 2.6Mohm, at 37% it was about 26 seconds.
That qn also had me stumped for a bit, assumed 37% was at the 30s mark, so I was getting 3.0M.
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GuessWho

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Re: Detailed Studies?
« Reply #13 on: June 16, 2011, 11:27:42 pm »
Yea I was unsure whether I should've subtracted 1000000 from it to take into account the 1M resistor that present. Made a last minute decision and chose C.
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ttn

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Re: Detailed Studies?
« Reply #14 on: June 16, 2011, 11:27:49 pm »
Oh crap, didn't notice it went back through the resistor again.

Damn... there goes another two marks from further electronics...
« Last Edit: June 16, 2011, 11:31:55 pm by ttn »
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