Exam 2 Answer Thread

[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]

I'm gonna do the impossible and disagree with Mel for some of those power loss questions.   :x

[melodrama]

were you supposed to?

[___]

i used total resistance of 4ohms  :?

everyone else i talked to after the exam did too

[AhaShake]

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]

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]

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.

[v2shan]

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

[Ahmad]

Yeah, so I got something like (can't remember very well):

2.5 A, 10 V, 2 V

6 W, 5 W, 5 W

[boulos90]

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]

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]

AH THAT'S NOT FAIR. NEAP HAD A SIMILAR QUESTION AND THEY USED 2.0 OHMS. FUCK YOU NEAP.

[maxleng]

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]

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]

k im gonna go chem now. mods, edit my answers if you like. unless... you contradict me ... LOL.