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Author Topic: CIE physics paper 2  (Read 11831 times)

Offline falafail

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CIE physics paper 2
« on: November 14, 2009, 02:43:25 pm »
the exam's after tomorrowwwwwwwwwwwwwww. :-\
so if you're doing past papers or whatever, post the tricky questions here.
and if you're revising, post about stuff you think is important, or stuff you don't get here.
etcetc

maybe we can help each other get awesome grades ;D
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Offline Tumble Bug

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Re: CIE physics paper 2
« Reply #1 on: November 14, 2009, 03:17:07 pm »
please check june 2002 paper 2 ques no 3 b (iii) how will  v solve this...i suppposed  x from the pivot ...but... nuthing
 the ans 108cm
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Offline falafail

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Re: CIE physics paper 2
« Reply #2 on: November 14, 2009, 03:25:40 pm »
Quote from: Tumble Bug on November 14, 2009, 03:17:07 pm
please check june 2002 paper 2 ques no 3 b (iii) how will  v solve this...i suppposed  x from the pivot ...but... nuthing
 the ans 108cm


okay, let's assume the distance from x to the center of gravity is d.
so 950d = (570 x 0.4) + (380 x 2.1)  <-- you use 950 because it's the weight, so it acts on the center of gravity. and 2.1 because it's 2.5 - 0.4
then you just solve for d.
the answer is 1.08 m.
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Offline Tumble Bug

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Re: CIE physics paper 2
« Reply #3 on: November 14, 2009, 03:31:37 pm »
Quote from: falafail on November 14, 2009, 03:25:40 pm
okay, let's assume the distance from x to the center of gravity is d.
so 950d = (570 x 0.4) + (380 x 2.1)  <-- you use 950 because it's the weight, so it acts on the center of gravity. and 2.1 because it's 2.5 - 0.4
then you just solve for d.
the answer is 1.08 m.

*gasp* OMG i really AM a blonde!! :o  :P

thanks a bunch!! :)
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Offline falafail

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Re: CIE physics paper 2
« Reply #4 on: November 14, 2009, 03:32:46 pm »
Quote from: Tumble Bug on November 14, 2009, 03:31:37 pm
*gasp* OMG i really AM a blonde!! :o  :P

thanks a bunch!! :)


s'okay, i cheated :P hahaha
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Offline Tyserius

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Re: CIE physics paper 2
« Reply #5 on: November 14, 2009, 05:53:19 pm »
Haha. Well, this is a good place for discussions :P
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Offline wannapass

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Re: CIE physics paper 2
« Reply #6 on: November 14, 2009, 06:14:02 pm »
hi anyone can give me some tips on the coming paper plz... i really wanna pass physics but i think i messed up in pap1 and pap4 can i recover in p2 and p5 plz someone rep me on this... thanks
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Offline falafail

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Re: CIE physics paper 2
« Reply #7 on: November 15, 2009, 12:57:40 pm »
QUESTIONSQUESTIONSQUESTIONS
get your past papers out, haha

june 05 question 6 (b) (ii)
nov 04 question 6 (b) (i)
nov 03 question 4 (a) how are you supposed to find the frequency from the graph(s)?  :-\ and, same question, part (b) (iii) wtf
nov 03 question 5 (a) (i) how do you know which one's the positive plate and which one's the negative? also, same question part (b) (ii)

phew.
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Offline saadiyah

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Re: CIE physics paper 2
« Reply #8 on: November 15, 2009, 01:05:47 pm »
plz can u help me with this question?

A point source of sound radiates energy uniformly in all directions. At a distance of 3.0 m from source, the amplitude of vibration of air molecules is 1.0 X 10-7 m. Assuming that no sound energy is absorbed, calculate the amplitude of vibration at a distance of 5 m from source.

Answer is 6.0 x 10-8 m.
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Offline falafail

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Re: CIE physics paper 2
« Reply #9 on: November 15, 2009, 01:18:12 pm »
Quote from: saadiyah on November 15, 2009, 01:05:47 pm
plz can u help me with this question?

A point source of sound radiates energy uniformly in all directions. At a distance of 3.0 m from source, the amplitude of vibration of air molecules is 1.0 X 10-7 m. Assuming that no sound energy is absorbed, calculate the amplitude of vibration at a distance of 5 m from source.

Answer is 6.0 x 10-8 m.

what paper is this from?
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Offline Tumble Bug

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Re: CIE physics paper 2
« Reply #10 on: November 15, 2009, 01:42:25 pm »
nov 03 question 5 (a) (i) how do you know which one's the positive plate and which one's the negative? also, same question part (b) (ii)

okay this ques...the plates..ur suppoused to look at the terminals of the battery...from there u knw k which is =ve and -ve...
and part bii...the energy u find in part b i is equal to the kinetic energy...make V the subject.... and u get 1.25*10 raise to power 7


m checking the other ques...i'll lrt u knw ..By the way..what does it mean wen they say k an ammetere or voltmeter has infinite resistance??
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Offline Tumble Bug

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Re: CIE physics paper 2
« Reply #11 on: November 15, 2009, 01:48:13 pm »
"nov 03 question 4 (a) how are you supposed to find the frequency from the graph(s)?   and, same question, part (b) (iii) wtf"

okay ur supposed to look at the time period from the graph and divide that by i as f = 1/tu get frequency....

part b m nt really sure about this but i saw in one of the past papers that when frequency is halfed...wavelrnght is doubled..nt sure...cnfrim this okay..
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Offline Tumble Bug

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Re: CIE physics paper 2
« Reply #12 on: November 15, 2009, 01:54:19 pm »
"june 05 question 6 (b) (ii)"


this question ur supposed to take out the perpendicular distance from the source...use sin thete = p/h u get sin 35* 2.5*10^-3 which is equal to 1.43*10^-3...multiply by force u get torque an d the oct 04 question..i dont knw that one :S
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Offline Tumble Bug

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Re: CIE physics paper 2
« Reply #13 on: November 15, 2009, 02:24:30 pm »
oct 2005 Q4 (a) (ii)

how are we suppouse to find area under tha graph????
 ???
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Offline saadiyah

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Re: CIE physics paper 2
« Reply #14 on: November 15, 2009, 02:31:23 pm »
Quote from: falafail on November 15, 2009, 01:18:12 pm
what paper is this from?
I guess it's paper 2. the question is from nov 85 paper.it's very old.
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