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In year 7, we had this madass teacher for science one day, wot he did to demonstrate diffusion: he mixed a huge amount of ammonium with a base. gofigure

and btw, use separate threads, not posts to submit new questions i dun want this thread clogged with several questions at a time

Re: Try this one... firstly, it's De-moivre's thm, not Moivre's mod-arg form means find modulus and argument by plotting 1+i and 1-i (there's heaps of other ways to figure argument out, the most common being figuring out the quadrant, and then applying tan-1), you get arg(1+i) = pi/4...

4u maths summaries don't get any better than the ones you find in textbooks, IMHO

haha...i see yeh not many ppl in the country can answer the stuff so dun need much to get good marks i had a look at the last question, din have a clue wot they were on about...

Hey, is anyone here going to the chemistry summer school this coming January? The training thing for chem olympiad, if you didn't realise...

Oh, and lemme compile a list of things you DON'T do when studying: 1) 22 hours a week of tuition (for all you maths ppl, it approximates to 2 hours a unit) And for all you maths ppl, assuming an average of $25 an hour, what would be your expenses per week? 2) Studying till 3a.m., and then...

'Slice of Heaven' and 'drolle' congrats to both of u (and to everyone else) But i liked the contrast between the two ways of studying. Slice of Heaven having done "excessive studying" to the verge of a breakdown, and drolle doin most of the work staying awake in class. Personally, I've...

methinks having ur name on the paper isn't a big woohoo especially when a zillion other names are on it so i dun really care that much if the media doesn't recognise the smarter pplz i jus think the media doesn't know enough to appreciate it

I guess there's different study methods for different subjects: english: write write write sciences: cram cram cram maths: think think think

Now, for any 2003 year 12's who are doing extension 2 next year: From my experience, a lot of ppl get stumped on one or two particular questions and then they get discouraged and enter some chronic depression state. So, if that happens to any of you, feel free to post any extension 2 (or...

.95 laz was .05 off o well... ...there ya go...

thx :p

Here's my results: chemistry: 95 economics: 90 english advanced: 91 maths ext1: 99 maths ext2: 99 physics: 95

hey guys, i thot it was over 92 in each subject?

hehe...you guys mean "lets look at it as how effective has the HSC been in measuring our intellect"

I reckon it's better to get whatever marks you can at the earliest day you can get it. You'd feel a lot worse when everyone knows their marks and you don't. Blissful ignorance isn't my kind of happiness.

No, you're not weird. And if at any one dream you managed to find out what the problem is, post it here so we can all have a crack at it.

in barium phosphate, the percentage phosphate is constant. it's equal to the mass of 2 units of phosphate, over the total formula mass of the barium phosphate. so barium phosphate always has 31.56% phosphate. so if you have 0.32g barium phosphate, you'll have 31.56% * 0.32g phosphate

I beg to differ pplz. Chudymaster was right with 1010ppm in the first place. Data: (NB: FW means formula weight) FW(Ba3(PO4)2) = 601.84 FW(PO4) = 94.97 Mass phosphate / mass barium phosphate = (94.97 * 2) / 601.9 = 189.94 / 601.84 = .3156 Now mass Ba3(PO4)2 = 0.32g so mass...