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## AM4R's Content

There have been 101 items by AM4R (Search limited from 21-January 21)

### #97600 THE EXAM!

Posted by AM4R on 15 May 2007 - 03:27 PM in Mathematics

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

### #97074 Stuck help

Posted by AM4R on 11 May 2007 - 05:05 PM in Physics

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

### #96270 help uncertainties!

Posted by AM4R on 21 April 2007 - 09:47 PM 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

### #94096 Conjectures

Posted by AM4R on 18 February 2007 - 04:59 PM in Mathematics

### #94067 Conjectures

Posted by AM4R on 17 February 2007 - 05:10 PM in Mathematics

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.__

### #93124 Post your desktop!

Posted by AM4R on 21 January 2007 - 09:56 PM in General Chat

### #93123 Coefficents

Posted by AM4R on 21 January 2007 - 09:54 PM in Mathematics

### #93060 Coefficents

Posted by AM4R on 20 January 2007 - 12:23 PM in Mathematics

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

### #92444 Differentiate log

Posted by AM4R on 01 January 2007 - 03:11 PM in Mathematics

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

Thanks alot

### #92424 Differentiate log

Posted by AM4R on 31 December 2006 - 03:56 PM in Mathematics

Im still a little confuzzled.

What would e be equal to here ? 10?

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

Thanks

### #92398 What are you listening to?

Posted by AM4R on 29 December 2006 - 12:09 PM in General Chat

so is klaxons - golden skans

### #92397 Differentiate log

Posted by AM4R on 29 December 2006 - 12:08 PM in Mathematics

thanks

Differentiate with respect to x

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

### #92243 Differentation

Posted by AM4R on 20 December 2006 - 08:19 PM in Mathematics

thanks

### #92195 Integration

Posted by AM4R on 19 December 2006 - 09:20 PM in Mathematics

x^2 + 3 / x

I get (x^2/2) +3

Thanks

### #92194 Differentation

Posted by AM4R on 19 December 2006 - 09:00 PM in Mathematics

ln(1 + x/1 - x)

Thanks

### #90851 The Football Thread

Posted by AM4R on 08 November 2006 - 10:56 PM in General Chat

Whats happening to us????

### #90849 Substitution

Posted by AM4R on 08 November 2006 - 10:51 PM in Mathematics

done it! thanks

### #90847 Substitution

Posted by AM4R on 08 November 2006 - 10:40 PM in Mathematics

### #90843 Substitution

Posted by AM4R on 08 November 2006 - 10:33 PM in Mathematics

So any chance with help, lol?

### #90839 Substitution

Posted by AM4R on 08 November 2006 - 10:27 PM in Mathematics

How u do that? lol

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