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Author Topic: Physics Discussion HERE ONLY!  (Read 32845 times)

Offline Bani

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Re: Physics Discussion HERE ONLY!
« Reply #210 on: June 05, 2009, 10:33:09 pm »
Quote from: MR.BooMBastiC on June 05, 2009, 10:27:27 pm
the medium was air.....i think

and what reason did u write ?
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Offline Diablo

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Re: Physics Discussion HERE ONLY!
« Reply #211 on: June 05, 2009, 10:37:53 pm »
Quote from: Bani on June 05, 2009, 10:31:38 pm
Quote from: cherrip on June 05, 2009, 08:08:22 pm
Yes It was , by working efficiency ...but i got confused as there was 25m given in th ques which I ddnt need to use in any part :-\
Anywayy I hope th curve will help us all  ;)


Efficiency  ??? I hope u did a diff variant paper, bec as far as I remember I used E=PT to solve the equation; E was 10% of the previous answer, and T was 1 second, so just substitute in the formula to find the power output....am I right?
Yeah, i think that was my same question -_-.... what was your final answer? 54000?
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Offline MR.BooMBastiC

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Re: Physics Discussion HERE ONLY!
« Reply #212 on: June 05, 2009, 10:40:47 pm »
Quote from: Bani on June 05, 2009, 10:33:09 pm
Quote from: MR.BooMBastiC on June 05, 2009, 10:27:27 pm
the medium was air.....i think

and what reason did u write ?

i forgot da question can u tell the question
cuz i only remember i wrote air
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Offline idk

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Re: Physics Discussion HERE ONLY!
« Reply #213 on: June 06, 2009, 04:49:30 am »
umm..the denser medium was medium A guys as ray was bending away from normal when entering air!
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Offline unknown

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Re: Physics Discussion HERE ONLY!
« Reply #214 on: June 06, 2009, 05:04:12 am »
Quote from: idk on June 06, 2009, 04:49:30 am
umm..the denser medium was medium A guys as ray was bending away from normal when entering air!
yeah agree wth u n yawht was d critical angle wasnt it 43
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Offline XaM!!

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Re: Physics Discussion HERE ONLY!
« Reply #215 on: June 06, 2009, 07:40:36 am »
hey whch xpands mur ice or water?
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Offline goin4dakill

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Re: Physics Discussion HERE ONLY!
« Reply #216 on: June 06, 2009, 08:18:37 am »
Quote from: SnEaKrzzz NyTe...... on June 06, 2009, 07:40:36 am
hey whch xpands mur ice or water?

I put water...because technically, when the ice is in the freezer (o-4c) it gets bigger, so when they are both melted..ice will be less water (becasue it only looked bigger) and water will stay the same... You get mah flow?
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Offline XaM!!

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Re: Physics Discussion HERE ONLY!
« Reply #217 on: June 06, 2009, 09:27:59 am »
but solids expand mur dan liquids.....
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Offline leebux101

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Re: Physics Discussion HERE ONLY!
« Reply #218 on: June 06, 2009, 09:39:14 am »
liquids expand more than solids cuz there molecules are more further apart than in solids.....
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Offline girl_92

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Re: Physics Discussion HERE ONLY!
« Reply #219 on: June 06, 2009, 09:59:00 am »
Quote from: deejay_cool on June 05, 2009, 07:46:32 pm
are u sure 54W its correct??? because people got 54000 or something... :S
it was 54000 because dey are not askin u how efficient it is dey jus said 10% of the total kinetic energy tht was 540000 is converted to electrical so tht wuld be equal to 54000
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Offline MR.BooMBastiC

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Re: Physics Discussion HERE ONLY!
« Reply #220 on: June 06, 2009, 10:13:00 am »
MADEE: thats right!!!!!!!!!!!!!!!

there was no efficiency it was simple math 
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Offline cherrip

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Re: Physics Discussion HERE ONLY!
« Reply #221 on: June 06, 2009, 01:17:39 pm »
both work, E=pt and efficiency...i first thought it was simple math to mutily 10% times previous answer but wen i saw ''include any equations, i realised there was a rule they wanted which could not only be (percentage X answer)  :-\...even though both get the same answer...did u guys gert th fraction as 1\8??
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Offline MR.BooMBastiC

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Re: Physics Discussion HERE ONLY!
« Reply #222 on: June 06, 2009, 01:33:51 pm »
i got 1/8 and its 100% correct
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Offline cherrip

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Re: Physics Discussion HERE ONLY!
« Reply #223 on: June 06, 2009, 02:15:14 pm »
r u sure its correct?? cz sm ppl say we should hav doubled th mass cz slower winds are heavier and tht way the fraction would be 1\2 :S ...did u ask any teacher or anyone other than students??
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Offline girl_92

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Re: Physics Discussion HERE ONLY!
« Reply #224 on: June 06, 2009, 02:52:35 pm »
Quote from: cherrip on June 06, 2009, 02:15:14 pm
r u sure its correct?? cz sm ppl say we should hav doubled th mass cz slower winds are heavier and tht way the fraction would be 1\2 :S ...did u ask any teacher or anyone other than students??
i did not get 1/8 i got 11/2 according to me wen the wind speed is half the mass displace will also be half so that brings it to a ratio of 1:2
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