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i think it's cos CO2 from the air acidifies it so the colour disappears...a good p-ein endpt should disappear in 2 minutes apparently...

from wot i've seen of silberberg, it sux. if you can get your hands on zumdahl, it's better but if you plan to buy the book, i suggest silberberg since UNSW uses silberberg and you might as well get the textbook just in case you study chem in uni. but yeh, if you want to learn some proper...

:rolleyes: that's wot i was trying to ask too...

woot? your argument is somewhat deficient here. imean, wot's the difference between 'competition' and 'Measuring progress against others of your own learning'? you can only have lowering self-esteem if you have expectations and you don't meet it. i think you're confused between the...

i actually feel sorry for Dr head. he's just a poor biology academic who's given up trying to yell over all those arrogant med students... yes, he gets mind blanks, but everyone gets mind blanks. he just has more frequent mind blanks because his brain is myelin-deficient...

ohh...but competition is one of the key reasons to enjoy learning. Learning is 'fun' when you learn something someone else doesn't know yet. Learning something that everyone knows is called 'catching up'.

how bout this: I{a->b} f(x) dx integral, upper bound b, lower bound a, integrate f(x) w.r.t. x

the question should be why are some of the mathematicians duped into doing med...

i haven't been to the USYD chem training, but i assume it's good... if you've been going well in high school chemistry, yes it's worth going. however, it won't help very much towards HSC chem (because HSC chem isn't real chem, it's english + social science). But it'll help you get thru uni...

5% is 5% weight / volume in which case since HCl has a lower molecular mass than CH3COOH, there's a larger number of acidic hydrogens in 5% HCL than in 5% CH3COOH. When you neutralise, you react acidic hydrogens with a base (in the case of NaOH, the OH-). It's a 1-to-1 ratio, i.e. H+ +...

oh yes...it's just a form that you fill out. It's questions about your life and your ambitions, so it's not that critical to show off in your 'CV', but make sure you keep a copy of what you send off, because they use it to ask you questions in the interview. Make sure you don't write anything...

the better you are, the faster you are...

UNSW ppl certainly din ask me to explain stuff in 'layman's terms'

ooh...i know how to do this one: if N is a 44445-digit number, then 10^44444 < N < 10^44445 N = 2003^x 10^44444 < 2003^x log both sides 44444ln10 < xln2003 similarly, xln2003 < 44445ln10 you'll find that x can never be an integer (since you're allowed to use a calculator)

*sigh* go tell your maths teacher to teach physics. maths HSC hasn't been contaminated with "having to put jargon". looks like he's just trying to show off...

Re: Ruse arent that intelligent You've gotten yourself into a contradiction here. You've implied that intelligence comes from hard work, but you've said that ppl who try hard at skoolwork are social outcasts. Do you mean to say that intelligent people are social outcasts? Then what do you...

Using the property SP + S'P is a constant (=2a) then S'P + PS" is a constant since S'PS" is collinear, and S' is fixed S" is a circle radius 2a about the point S'

Well, there's one I can think of so far, but it's a hassle and probably not worth considering. Using the property that triangle formed by the tangent and the two asymptotes has area = ab. Now, consider a tangent to the hyperbola in the 1st quadrant. If this was y=mx + c, then m > 0, c <...

UMAT part 3 practice: read a lot of "where's wally' books...

Ultimately depends on who you meet. I'd classify about 10 ppl in my grade (of 160) being study freaks.