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#73203 AI NAB

Posted by jambo david on 29 March 2006 - 08:42 PM in Computing

What do i need to know for my AI nab, theres AI, prolog, what else???

HELP PLEASE!!!



#73145 Log questions - Help

Posted by jambo david on 28 March 2006 - 07:55 PM in Mathematics

QUOTE(The Wedge Effect @ Mar 28 2006, 08:48 PM) View Post

Ah, in that case, you use the laws of logarithms to simplify the expression:



\begin{align*}\log{10^k}=2.3\end{align*}


\begin{align*}k\log{10}=2.3\end{align*}

Bear with me, I need to work on this a bit. Is the base 10 or something else (if one is given)?

Edit: If no bases are given, I'll assume the answer is:



\begin{align*} k=\frac{2.3}{\log{10}}\end{align*}

the base isn't given

i really appreciate the help



#73143 Log questions - Help

Posted by jambo david on 28 March 2006 - 07:46 PM in Mathematics

QUOTE(The Wedge Effect @ Mar 28 2006, 08:40 PM) View Post

QUOTE(jambo david @ Mar 28 2006, 08:15 PM) View Post

1. Given that log10^k=2.3, write down an expression for the exact value of k

2. Solve e^3x=15

Cheers sad.gif


I'm a bit unclear on the first question. Is it asking you to find 

\begin{align*}\log_{10}^k=2.3\,.\end{align*}

or 

\begin{align*}\log_{10} k=2.3\,.\end{align*}

?

To find the answer for question two, you take logs of both side using the natural logarithm.



\begin{align*}ln.e^{3x} = ln.15\end{align*}

Use the laws of logarithms with powers to get:



\begin{align*} 3x.ln.e = ln.15\\ .\end{align*}

ln(e) cancels to get 1 so



\begin{align*} 3x=ln.15 \\.\end{align*}



\begin{align*}x=\frac {ln 15}{3}\\ \,.\end{align*}

In reply to SncZ, my answer would be sufficient, it's not that necessary to use a calculator, you can express it in simplified form like this, unless it specifically asks for the value to a number of decimal places.



question 1 is Log10^k=2.3

the 10 is big if you know what i mean, normal sized



#73136 Log questions - Help

Posted by jambo david on 28 March 2006 - 07:15 PM in Mathematics

1. Given that log10^k=2.3, write down an expression for the exact value of k

2. Solve e^3x=15

Cheers sad.gif



#73004 The Great Gatsby - Sample Essay

Posted by jambo david on 27 March 2006 - 02:58 PM in English

QUOTE(Yurimaru @ Mar 27 2006, 09:18 AM) View Post

I do - but you'll have to wait until Tuesday or Wednesday before I can post them up, because they're not on my computer now. I also have the notes I used last year if you want?

that would be great thanks ohmy.gif



#72961 The Great Gatsby - Sample Essay

Posted by jambo david on 26 March 2006 - 07:02 PM in English

Does anyone have any sample essays for the great gatsby. I'm kind of stuck and looking for ideas to write an essay.

Cheers sad.gif



#66588 Worked solutions

Posted by jambo david on 26 January 2006 - 06:42 PM in Physics

QUOTE(Rocky @ Jan 23 2006, 11:37 PM)
Whats the link, as I can't find it aaaaaa *pulls hair*

View Post


sorry if it's too late but http://www.mathsrevision.com/index_files/Page1012.htm



#65893 Forming alkalis

Posted by jambo david on 18 January 2006 - 02:02 PM in Chemistry

Also does anyone have a site that goes through the past paper questions, explaining the answers? A long shot maybe



#65892 Forming alkalis

Posted by jambo david on 18 January 2006 - 02:01 PM in Chemistry

I can't remember standard grade that well but i thought alkalis were made when a metal oxide is dissolved in water.

Quiestion 2 in past paper 2001 says

Which gas would issolve in water to form an alkali?

A HBr
B NH3
C CO2
D CH4

Answer in B NH3

Can someone explain this please? blink.gif



#65721 Worked solutions

Posted by jambo david on 16 January 2006 - 06:35 PM in Physics

Don't suppose you have a link to a formulae list?
Pushin my luck? cool.gif



#65720 Worked solutions

Posted by jambo david on 16 January 2006 - 06:26 PM in Physics

Thanks a lot biggrin.gif



#65709 Worked solutions

Posted by jambo david on 16 January 2006 - 04:53 PM in Physics

I found a site with worked solutions for maths past papers. Is there one for phyics?



#65708 2002 Past Paper Q22ci

Posted by jambo david on 16 January 2006 - 04:52 PM in Physics

Calculate the force exerted by the nitrogen on the piston when the reading on the pressure gauge is 1.75*10^5Pa.

I tried using p=f/a but there is no area given that i can see.



#65671 2003 paper 2, question 8

Posted by jambo david on 15 January 2006 - 09:29 PM in Problem Questions

Haha, i just missed out the x^3, i had it quared. Anyway, i had the concept right but i'll definately make sure i don't make a mistake like that tomorrow. Cheers, really appreciate it biggrin.gif



#65663 2003 paper 2, question 8

Posted by jambo david on 15 January 2006 - 08:29 PM in Problem Questions

Hi, i'm having trouble with part b, trying to find the minimum surface area, i managed to do this for another question but it's just not working here, can anyone give me a hand. I was going to use www.mathsrevision.com but it's not working any more sad.gif



#65659 Paper 1 2004, Question 7

Posted by jambo david on 15 January 2006 - 06:34 PM in Problem Questions

QUOTE(aldo @ Jan 15 2006, 12:35 PM)
This particular integration is dealt with in Unit 3 of the course, Further Differentiation and Integration, so you may not have covered it yet!

I have attached a document which shows you the relevant way to start the problem, and I should just note that you wouldn't be given this formula in your exam.

If you require a bit more help in getting to the answer, as it is quite tricky, just put up another post!

Good luck!!

View Post


Cheers very much, i was very confused, turns out i haven't done it yet so it won't be in my prelim tomorrow. I think i should be ok now



#65623 Paper 1 2004, Question 7

Posted by jambo david on 14 January 2006 - 10:34 PM in Problem Questions

Sorry i can't put the question up but i don't know how to get the signs. Anyway can anyone tell me why when this is integrated, is the top line divided by the power+1(i get it so far) but then multiplied by 4?

I'm sure it's something simple but i just don't understand where the 4 came from ohmy.gif