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#97782Exam 07

Posted by on 16 May 2007 - 03:53 PM in Physics

oh and did you all use the value for mean radius of moon orbit for most of the earthy type questions

#97780Exam 07

Posted by on 16 May 2007 - 03:50 PM in Physics

everyone thought it was quite good, For the inertia questions did you use 1/2 mr^2?

#97600THE EXAM!

Posted by on 15 May 2007 - 03:27 PM in Mathematics

So what did you all think of it??

I personally thought it was really hard, any ideas what the grade boundaries might look like???

#97316Stuck help

Posted by on 14 May 2007 - 09:38 AM in Physics

#97074Stuck help

Posted by on 11 May 2007 - 05:05 PM in Physics

Im stuck on these questions. Can someone help?

1. An alpha particle with velocity of 2 x10^6 is fired at a target of gold foil in a vacuum. The mass of the alpha particle is 6.7 x 10^-27 and the atomic number for gold is 79.

Calculate the distance of closest approach.

2. r^3 = Gm/4pie^2 (T^2)

The orbital period of a geostationary satellite is equal to the period of rotation of the earth about its axis.

Calculate

the height of the satellite above the earths surface.
the speed of the satellite in its orbit.

Thanks

#96271I need a bit of help...quick please!

Posted by on 21 April 2007 - 09:49 PM in Physics

any idea how i do that?

Thanks

#96270help uncertainties!

Posted by on 21 April 2007 - 09:47 PM in Physics

Whoosp posted this in the wrong section before!
Say i have two different uncertainties of different units. Say one is of measurement (metres) and one is of frequency. How do I combine these to get a total uncertainty which has both in them??

Any help would be appreciated.
Thanks

#96259I need a bit of help...quick please!

Posted by on 21 April 2007 - 09:56 AM in Physics

Say i have two different uncertainties of different units. Say one is of measurement (metres) and one is of frequency. How do I combine these to get a total uncertainty which has both in them??

Any help would be appreciated.
Thanks

#94096Conjectures

Posted by on 18 February 2007 - 04:59 PM in Mathematics

#94067Conjectures

Posted by on 17 February 2007 - 05:10 PM in Mathematics

Right this will probably be in my nab and i dont have a clue what the question is asking me to do and what numbers I am suppoesed to use.

Can someone help me and take me through how im meant to answer it.

Thanks

Disprove the conjecture:
bc is divisible by a => either b is divisible by a or c is divisible by a.

Posted by on 21 January 2007 - 09:56 PM in General Chat

Where is everyone getting Vista from?????

#93123Coefficents

Posted by on 21 January 2007 - 09:54 PM in Mathematics

Thanks for that. Really helps

#93060Coefficents

Posted by on 20 January 2007 - 12:23 PM in Mathematics

Hi

Could someone help me with a this type of question, I dont know really know how to this as I was off school when it was done and the teaher just skimmed over it, so the more deatil the better.

Thanks

Find the coefficient of x^10 in the expansion ( 3x^2 + 4/x^3)^10

#92444Differentiate log

Posted by on 01 January 2007 - 03:11 PM in Mathematics

ah right

I understand now, all i did was use the chain rule

Thanks alot

#92424Differentiate log

Posted by on 31 December 2006 - 03:56 PM in Mathematics

Thanks for the help dfx.

Im still a little confuzzled.

What would e be equal to here ? 10?

Also would dy/dx = (x + (1/x^2))

Thanks

#92398What are you listening to?

Posted by on 29 December 2006 - 12:09 PM in General Chat

Keanes new song is ace - a bad dream

so is klaxons - golden skans

#92397Differentiate log

Posted by on 29 December 2006 - 12:08 PM in Mathematics

Can someone help me with this.

thanks

Differentiate with respect to x

log(x + (1/x^2))

#92243Differentation

Posted by on 20 December 2006 - 08:19 PM in Mathematics

whoops i didnt make that clear. Its differentiation and Its ln (1+X)/(1-X)

thanks

#92195Integration

Posted by on 19 December 2006 - 09:20 PM in Mathematics

Can somone tell me where I am going wrong here becuase when I integrate this I dont get any 'ln' in the answer but the back of my textbook does???

x^2 + 3 / x

I get (x^2/2) +3

Thanks

#92194Differentation

Posted by on 19 December 2006 - 09:00 PM in Mathematics

Can someone help with this please. I dont know where to start and what rules I use to get through this question.

ln(1 + x/1 - x)

Thanks

Posted by on 08 November 2006 - 10:56 PM in General Chat

me 2,

Whats happening to us????

#90849Substitution

Posted by on 08 November 2006 - 10:51 PM in Mathematics

ahh right!!! thanks alot Wedge

done it! thanks

#90847Substitution

Posted by on 08 November 2006 - 10:40 PM in Mathematics

yeah I thats what i thought but it says in the question to use the substitution.

#90843Substitution

Posted by on 08 November 2006 - 10:33 PM in Mathematics

nice one

So any chance with help, lol?

#90839Substitution

Posted by on 08 November 2006 - 10:27 PM in Mathematics

yeah exactly

How u do that? lol