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Physics Discussion HERE ONLY!

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leebux101:

--- Quote from: MR.BooMBastiC on June 06, 2009, 05:38:00 pm ---XXXXCUSE ME......BRAGGING!!!!!!!!!!!!!!

I NEVER SAID MY PAPER WENT THE BEST ETC......

I JUST SAID IT WAS OK

I NEVER BRAGGED!!!!!!!!

--- End quote ---
yeah ok wutever.....but i am sure the ppl who did minus ur rep had a good reason....besides .....seriously it duznt even matter....its just a stipid rep...its not ur real world rep....who cares...anyways where r u from??

MR.BooMBastiC:
SOUTH africa!!!!!

Johannesburg!!!!!

leebux101:
dude...seriously...relax...big deal man its just a rep tht duznt count....lol...relax...i dont get y ppl are fussed over this rep so much....

goin4dakill:

--- Quote from: MR.BooMBastiC on June 06, 2009, 05:52:28 pm ---SOUTH africa!!!!!

Johannesburg!!!!!


--- End quote ---

ME TOOO!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Well, half at least :)

zmnigcse:
Erm, man the windmill question was a little depressing  :'(

Anyway, what I did was.. erm

It's hard to recollect  ::)

I guess there was a question before the one where we had to find the mass, where they asked us to find out the power... shwoing all your calculations
Using the efficiency percentage they gave as 10%, I calculated the Energy as 54,000 Joules.
THEN, the E=Pt P= E divided by T. 54000/1 = 54,000 W (watts)

Then, erm, I was really confused for the next one.
I thought about using the Energy formula itself like KE= 0.5 mv2
but then i thought.. if the velocity is halved, how would the mass increase  :-\ cuz technically if the velocity decreased, then the mass of air passing through the turbines should fall...
... So I just used a ratio and got an answer I can't seem to remember  ???

BUT I think I'm wrong. As they said earlier, probably a heavier mass would mean that speed has decreased  :-[
BUT I DID get the fraction as 1/8... These two answers were really difficult   >:(

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