Author Topic: Physics Discussion HERE ONLY!  (Read 32847 times)

Offline Bani

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

and what reason did u write ?

Offline Diablo

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Re: Physics Discussion HERE ONLY!
« Reply #211 on: June 05, 2009, 10:37:53 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?

Offline MR.BooMBastiC

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Re: Physics Discussion HERE ONLY!
« Reply #212 on: June 05, 2009, 10:40:47 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

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!

Offline unknown

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Re: Physics Discussion HERE ONLY!
« Reply #214 on: June 06, 2009, 05:04:12 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

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?
Dnt walk As iF u RulE da WorLd..... Walk As if U dOnT CarE wHO RuLzz It.......



Offline goin4dakill

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Re: Physics Discussion HERE ONLY!
« Reply #216 on: June 06, 2009, 08:18:37 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?

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.....
Dnt walk As iF u RulE da WorLd..... Walk As if U dOnT CarE wHO RuLzz It.......



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.....

Offline girl_92

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Re: Physics Discussion HERE ONLY!
« Reply #219 on: June 06, 2009, 09:59:00 am »
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
some people sleep to dream while othrs wakeup to follow dem im the second type how abt u

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 

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??

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

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??

Offline girl_92

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Re: Physics Discussion HERE ONLY!
« Reply #224 on: June 06, 2009, 02:52:35 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
some people sleep to dream while othrs wakeup to follow dem im the second type how abt u