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Author Topic: How did u guyz do in phys p1 ?  (Read 10961 times)

Offline piggydiggy

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Re: How did u guyz do in phys p1 ?
« Reply #105 on: May 20, 2010, 01:54:39 pm »
p1 is greaaat, better than any other test..  :D
but the time is not enoughh.. 20 minutes left and im still in numba 20 or more...  :-\
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Offline Twinkle Charms

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Re: How did u guyz do in phys p1 ?
« Reply #106 on: May 20, 2010, 02:04:08 pm »
yeaah
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Offline sloe

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Re: How did u guyz do in phys p1 ?
« Reply #107 on: May 20, 2010, 02:26:57 pm »
What did u guys get for the frequency of the square wave question?
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Offline [Spy]

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Re: How did u guyz do in phys p1 ?
« Reply #108 on: May 20, 2010, 02:30:52 pm »
140Hz
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Offline Twinkle Charms

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Re: How did u guyz do in phys p1 ?
« Reply #109 on: May 20, 2010, 02:45:56 pm »
cool u guys actually rememba the answers!! nice
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Offline cashem'up

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Re: How did u guyz do in phys p1 ?
« Reply #110 on: May 20, 2010, 03:06:23 pm »
wat did ya guys get for that power on 5500W i think........
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Offline MAF

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Re: How did u guyz do in phys p1 ?
« Reply #111 on: May 20, 2010, 03:10:08 pm »
yeah...power was 5.5kW...
and By the way what was the uncertainty in question 3? i got 0.6 but people were saying its wrong or something...
and what was the answer in the lithium question where it underwent some nuclear process?
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Offline highly_ambitious

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Re: How did u guyz do in phys p1 ?
« Reply #112 on: May 20, 2010, 03:24:11 pm »
hey guys, what did ya'll right for the question which asked abt efficiency. I wrote D..plz explain if it's correct. n was the answer for first question 1.95mm?











« Last Edit: May 20, 2010, 03:29:14 pm by highly_ambitious »
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Offline [Spy]

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Re: How did u guyz do in phys p1 ?
« Reply #113 on: May 20, 2010, 03:35:13 pm »
answer of uncertainity 0.6 FOR SUREEEEEE

effeciency was C look back in the topic i explained.

and for the power its 5.5kw, and im pretty sure :)
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Offline MAF

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Re: How did u guyz do in phys p1 ?
« Reply #114 on: May 20, 2010, 03:43:13 pm »
efficiency was mgsina/f. i think that was the option D. and about that i'm sure :)
and spy could you do the uncertainty question here?
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Offline cashem'up

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Re: How did u guyz do in phys p1 ?
« Reply #115 on: May 20, 2010, 03:46:09 pm »
Quote from: highly_ambitious on May 20, 2010, 03:24:11 pm
hey guys, what did ya'll right for the question which asked abt efficiency. I wrote D..plz explain if it's correct. n was the answer for first question 1.95mm?

ans for a was 1.45mm







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Offline cashem'up

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Re: How did u guyz do in phys p1 ?
« Reply #116 on: May 20, 2010, 03:49:41 pm »
Quote from: Spy on May 20, 2010, 03:35:13 pm
answer of uncertainity 0.6 FOR SUREEEEEE

effeciency was C look back in the topic i explained.

and for the power its 5.5kw, and im pretty sure :)

no man the efficiency is D m pretty sure :)
yes as u said energy input is Fs
and energy output is not ke because if i am not wrong speed was constant so u have to use pe...thus mgh/fs however we dont know h
so mgsina x s / fs so mgsina/f
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Offline cashem'up

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Re: How did u guyz do in phys p1 ?
« Reply #117 on: May 20, 2010, 03:50:37 pm »
Quote from: MAF on May 20, 2010, 03:43:13 pm
efficiency was mgsina/f. i think that was the option D. and about that i'm sure :)
and spy could you do the uncertainty question here?

hey tht question i can solve can u jst recall the values for uncertainty
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Offline highly_ambitious

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Re: How did u guyz do in phys p1 ?
« Reply #118 on: May 20, 2010, 03:51:29 pm »
Quote from: Spy on May 20, 2010, 03:35:13 pm
answer of uncertainity 0.6 FOR SUREEEEEE

effeciency was C look back in the topic i explained.

and for the power its 5.5kw, and im pretty sure :)

uncertainity answer was 0.5 for sureeeeeeeeeeeeee

efficiency was d...for sureeeeeeee

n yeah ! for power 5.5kw Thanks!

does any one remember answer for rubber band wala question...there were graphs of force to extension and rubber was stretched till it's breaking point?  was was the ans...i wrote A is it's correct? plz explain..
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Offline [Spy]

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Re: How did u guyz do in phys p1 ?
« Reply #119 on: May 20, 2010, 03:52:59 pm »
no im sure its C because effeciency=work/energy input
and we all know work=ke=0.5mv^2 and energy input is worke done by driving force which is equal to Fs

0.5mv^2/Fs = mv^2/2Fs

it had nothing to do with mgsin because its energy and mass not weight
and even if it was constant so? just keep it 0.5mv^2 you still have a velocity
though you have a point ima_shah2002 :P

yes i can if someone can remind me of the values :)
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