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maxleng

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Exam 2 Answer Thread
« Reply #15 on: November 14, 2007, 01:29:30 pm »
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Quote from: "v2shan"
Quote from: "maxleng"
according to this Q (neap 2006)

a larger slit width has a larger pattern, and smaller width has a smaller pattern (note: spacing is still the same) which should give the answer C on our exam


sry, but the answer for that is wrong, i checked with my tutor a few weeks ago

n spirited i got the same cept for the 2nd light q, were u meant to get the h value from the graph as well, cos i just used the 6.63E-34..... ooh i think thats y it was 3 marks, was it 3marks?... oh n u have very good memory


what a load of SHIT ahhhhh fuck you NEAP

Ahmad

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Exam 2 Answer Thread
« Reply #16 on: November 14, 2007, 01:30:06 pm »
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I'm gonna do the impossible and disagree with Mel for some of those power loss questions.   :x
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melodrama

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Exam 2 Answer Thread
« Reply #17 on: November 14, 2007, 01:30:39 pm »
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were you supposed to?

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Exam 2 Answer Thread
« Reply #18 on: November 14, 2007, 01:31:15 pm »
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i used total resistance of 4ohms  :?

everyone else i talked to after the exam did too

AhaShake

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Exam 2 Answer Thread
« Reply #19 on: November 14, 2007, 01:31:18 pm »
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I am going to agree with Ahmad. You had to remember the resistance was 4 ohm not 2 ohm.
I got nervous there, without Ahmad questioning it on the first page. But good.

Matt89

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Exam 2 Answer Thread
« Reply #20 on: November 14, 2007, 01:31:19 pm »
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Quote from: "maxleng"
Quote from: "Matt89"
Quote from: "Spirited Sloth"
2.5 A, 11 V, 2.2 V, 6W, 5.5W, 5.5W


Totally f***ed that one up. I stuffed up the calculation of the power, so I lost 3 marks  :(


woah i got diff answers...i think cos i used a resistance of 4 ohms SHIT!!!!


I used resistance of 4 ohms, but i accidentally used 2.5 A instead of 0.5 A

melodrama

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Exam 2 Answer Thread
« Reply #21 on: November 14, 2007, 01:31:59 pm »
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what i did was find the frequency from the graph and i got 0.9eV... it'll be about +/- 0.1 depending on how you draw your graph i guess.

omg. ahmad disagrees with me. damn, -1934871394871 marks for me.

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v2shan

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Exam 2 Answer Thread
« Reply #22 on: November 14, 2007, 01:32:14 pm »
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i dunno w/e 2 marks to conservative, practical was all good but what bout theory, some tricky q's i reckon e.g. the hydrogen emission one
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Ahmad

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Exam 2 Answer Thread
« Reply #23 on: November 14, 2007, 01:33:26 pm »
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Yeah, so I got something like (can't remember very well):

2.5 A, 10 V, 2 V

6 W, 5 W, 5 W
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boulos90

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Exam 2 Answer Thread
« Reply #24 on: November 14, 2007, 01:33:43 pm »
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2.5 A, 11 V, 2.2 V, 6W, 5.5W, 5.5W

i got 2.5A, 10V, 2.0V 6W, 5W, and 5W i think...

I took resistance in power lines to be 4ohms

hifer

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Exam 2 Answer Thread
« Reply #25 on: November 14, 2007, 01:33:53 pm »
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Quote from: "Spirited Sloth"
but when you increase gap width, you increase w and thus ratio wavelength/w decreases and there's less diffraction, meaning that it'll bunch up... i dunno. i said C initially but i changed my mind.


Yup, it's definitely B for that one

melodrama

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« Reply #26 on: November 14, 2007, 01:34:08 pm »
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AH THAT'S NOT FAIR. NEAP HAD A SIMILAR QUESTION AND THEY USED 2.0 OHMS. FUCK YOU NEAP.

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maxleng

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« Reply #27 on: November 14, 2007, 01:34:11 pm »
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i said sunlight is missing the energy of hydrogen since it uses it, hence when passed through a prism the spectrum of hydrogen will not be seen


i dont think its totally right tho  :?

maxleng

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« Reply #28 on: November 14, 2007, 01:34:39 pm »
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Quote from: "Spirited Sloth"
AH THAT'S NOT FAIR. NEAP HAD A SIMILAR QUESTION AND THEY USED 2.0 OHMS. FUCK YOU NEAP.


LOL lets go burn down NEAP head quarters  :twisted:  :twisted:  :twisted:

melodrama

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Exam 2 Answer Thread
« Reply #29 on: November 14, 2007, 01:34:56 pm »
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k im gonna go chem now. mods, edit my answers if you like. unless... you contradict me ... LOL.

English 45  Chemistry 45  Specialist 45  Physics 44  Chinese 40  Methods 44  ->  ENTER 99.75