Mechanics - waves : energie expression kya hota hai?

24

eureka123 ·2009-03-16 11:17:15

energy density =2Ï€² f²A²Ï

So E1/E2=25/4

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MATRIX ·2009-03-16 11:18:41

E1/E2=25/4 haha.....ya eureka me too getting the same....

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avni ·2009-03-16 11:18:46

ha me 2 thot da same!

but ans isnt 25/4 its sumthin else, kuch aur socho

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MATRIX ·2009-03-16 11:19:52

is the answer 19/4....thought i another way.nw but correct me if im wrong..

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avni ·2009-03-16 11:21:58

NO [2]

it dusnt involve squaring

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24

eureka123 ·2009-03-16 11:22:31

whats the ans??????????then we will think.....[3][3]

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avni ·2009-03-16 11:23:46

10/4

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33

Abhishek Priyam ·2009-03-16 11:25:31

5/2 only [11]

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11

Mani Pal Singh ·2009-03-16 11:27:11

UR ANSWER COULD BE WRONG[1]

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avni ·2009-03-16 11:28:51

woh ho sakta hai.......

got this frm tcyonline.com

i don know if they r rite or wrong

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iitimcomin ·2009-03-16 11:30:00

give the exact question please...

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24

eureka123 ·2009-03-16 11:30:22

its wrong dear..........

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Abhishek Priyam ·2009-03-16 11:32:02

well lets wait if some one comes forward with some new weapons to blow this one... but at present i am not having any thing to give ans other than 25/4

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avni ·2009-03-16 11:32:43

its exact only!!

OH K!!! i 2 feel it shud b wrong

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iitimcomin ·2009-03-16 11:35:00

if u want derivation of energy density ...[gud for rememberance ...].........

y=Asin(kx - wt) ...

vel. of any particle on string[imagine to be wave on string ........]

dy/dt = -Awcos(kx - wt) .......

KE = âˆ«1/2Pdx(dy/dt)²

PER UNIT LENGTH[DENSITY] = 1/2PA²W²cos²..blahbla..........

then PE also ull get smae experssion[final] .......uve to take dy/dx here .............

add both ull get engy....

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MATRIX ·2009-03-16 11:35:11

haha..10/4=5/2*2/2........

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waves : energie expression kya hota hai?

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