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Post by Big Boy Bulley on Sun Oct 05, 2008 12:44 pm

Trust me its not, i had to do 8 (3 of which i gave up on) and each took me about 15 mins!!
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Post by Big Boy Bulley on Sun Oct 05, 2008 12:47 pm

I ahve some online Further Maths homework if anyone wants to do it for me??
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Post by Deilos on Sun Oct 05, 2008 1:48 pm

When you say online, are you talking about MyMaths? We have to do that every now and then, so much easier than regular questions!
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Post by Big Boy Bulley on Sun Oct 05, 2008 1:55 pm

No my maths is pants, we use MEI
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Post by widdows9000 on Sun Oct 05, 2008 2:29 pm

We use mymaths, only problem is the stuff that comes up on there is very often completely different to the stuff are useless teacher 'teaches' us.
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Post by funky44 on Sun Oct 05, 2008 2:52 pm

Can you post it in a googledoc? or put something online and get me a link. I might take a quick look at it. Smile
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Post by Big Boy Bulley on Sun Oct 05, 2008 3:05 pm

Right tell me if this link works

http://www.meiresources.org/test/m1c1q.pdf

You wont be able to do it for me, cus i have to enter answers online, but im gunna do it tommorrow, and if you have had a look i might ask you if you have the same answers. Oh and btw its mechanics
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Post by funky44 on Sun Oct 05, 2008 3:27 pm

first 3 are quite easy. I need to see my formulae for 4 and onward

Edit: but my subwoofer is standing on that book
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Post by funky44 on Sun Oct 05, 2008 3:48 pm

And done. I remember the formulas, I didn't had to use them the past 3 years? Smile
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Post by jerryGFL on Sun Oct 05, 2008 5:27 pm

Ialways loved that bit of mechanics. You jusst need to knwo those 4 forumlas of by heart.
It always helps to just sketch what is going on in the more complex wquestions.
And before you use a formula you should always write down what you are given v, u, a etc
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Post by Big Boy Bulley on Mon Oct 06, 2008 10:52 am

Yeah isnt too tricky!

However im going to be able to get away with not doing it!
Our teacher forgot to send everyone the link, i just happened to jot down the relevant page!!

Might give it a go anyway!
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Post by funky44 on Mon Oct 06, 2008 12:02 pm

Well, you can post the things you found then I'll see if they match mine and then we will have a battle to the death to decide who is right and who is wrong! Very Happy
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Post by imh0tep on Mon Oct 06, 2008 3:02 pm

those questions are really easy. You only need 1 formula. It's always doing the same thing

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Post by Alex Steiner on Mon Oct 06, 2008 5:43 pm

Big Boy Bulley wrote:Right tell me if this link works

http://www.meiresources.org/test/m1c1q.pdf


Just glancing through, the answers are all 'e's. Duh. Razz


I could work it out, but I'm too lazy. Razz
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Post by RoryMcDonald on Mon Oct 06, 2008 5:53 pm

I think BBB is doing the same course as me Smile
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Post by Big Boy Bulley on Wed Oct 22, 2008 11:03 am

Right ive had to resurect this thread cus i dont have a clue whats going on with my physiscs homework!
Any help (answers even) would be greatly appriciated!

1. When liquid flows under pressure P through tube of length l, the volume flow rate (i.e. the volume per unit time), V, depends on the radius r, of the tube, the pressure gradient, P/l, and the viscosity, n, of the liquid. Use the method of dimensions to derive the form of an equation for V in terms of the other quantities.



2. A sphere moving through a fluid of density p experiences a drag force that depends on its speed, v, and its radius, r.

(a) Use the method of dimensions to derive the form of an equation for the force, F, in terms of p, r and v.

(b) sketching graphs, so i figure that aint gunna work, but if u can help with those bits great!


Sorry if i put anyone off taking A level physics! lol
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Post by mr. brodie on Wed Oct 22, 2008 11:19 am

Homework Thread - Page 4 Lol_wu10

I mean, who does h/w these days?
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Post by elbanaan on Wed Oct 22, 2008 11:38 am

well the first is Delta P = 8*n*Q*L/(Pi*r^4) , ths in laminar flow
for the speed: what speed? average or max?

I don't know what the "method of dimensions" is though.


2nd: F = 1/2 p vē * A * C

A being r*r*Pi
C being a drag coefficient (depends on velocity and viscosity)
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Post by Big Boy Bulley on Wed Oct 22, 2008 2:16 pm

Right thanks, but i still dont have a bloody clue where the hell you got that from!!
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Post by elbanaan on Thu Oct 23, 2008 3:44 am

the first you can derive from the navier-stokes equation.

just google poiseulle's law.

2nd is the general law of drag, learned it in car-dynamics. Smile
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Post by Mulgrave on Thu Oct 23, 2008 5:36 am

Ahaha Got a C at AS Physics, dropped it this year.
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Post by Big Boy Bulley on Thu Oct 23, 2008 9:03 am

Thanks elbanaan, we handed it in today (or not) since only 1 of 26 of us had done it!!
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Post by jerryGFL on Thu Oct 23, 2008 9:32 am

let me guess that was you?
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Post by Big Boy Bulley on Thu Oct 23, 2008 9:51 am

No, i still dont have a clue how to answer it, and elbanaans answer cant be right since he uses things not even given to you!
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Post by elbanaan on Thu Oct 23, 2008 10:16 am

the answer is right! the method maybe isn't, but I don't know what "the method of dimensions" translates into Sad.
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