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I understand redox reactions. But when it comes to the batteries, I am yet to memorise structure/uses, etc of a particular cell. Thanks for your help guys.

What sort of production is the Genesian one? Like what sort of reading is it? Also how long does it go for?

If I remembered, I wouldn't be asking this question. But I think we might be doing Shipwrecks or Idustrial Chemistry, not sure if my teacher has decided yet. So I might have to learn it either way, but for the time being I'll just ignore it.

We've got to do a speech for this module, which will be done first week of term 2.

Ok cool. Btw, you guys are doing a great job. We really appreciate it. Keep it up!

But if it's an essay for AOS, that would mean that we wont get an essay in paper 2, so unless you've done like heaps and hepas of essays for AOS then there is no advantage of getting the essay in AOS since, according to my teacher, in each module + AOS they ask you to write in a different form...

I'm not sure about the second part but for the first part is it just: z'= (1+x)/(x² + y²) - iy/(x² + y²) so x'= (1+x)/(x² + y²) and y'=-y/(x² + y²) Edit: forgot to add the x

Re: Re: electrolysis, electroplating By that do you mean just knowing that electrolysis is the conversion of electrical energy into chemical and that it can be used to coat/protect metals, etc. Would you need to know the distinctions between an electrolytic cell and a galvanic cell, and do...

From what I undestand we don't need to know anything about electrolysis and electropplating for the Production of Materials Module. But for those people doing Shipwrecks they do need to know this stuff. Is this correct?

The equation x³ + 2x + 1=0 has roots a, b, and c. Evaluate a⁴ + b⁴ + c⁴ So we know that, a + b + c= 0 ab + ac + bc=2 abc= -1 But using these I am still not able to get the final solution. I get: a⁴ + b⁴ + c⁴...

Thanks! I didn't realise it was a simple as that. I guess the wording stuffed me up.

Find all straight lines y=mx + k which cut the cubic curve y=x³ + Ax² + Bx + c in three equidistant points and show that all these lines pass through a fixed point on the cubic. Basically I don't even where to start in this question.

My 4U teacher actually says to spend as much time on 4U as you do on any other subject, since its scaled so highly. So basically if you do 12 units, you should spend 1/3 of your time on maths.

Yea that's what I got now. Stupid mistakes! Thanks!

If tan@=ktanb, show that (k-1)sin(@+b)=(k+1)sin(@-b) All I can come up with is getting expressions for sinb, sin@, cosb, cos@ and then expanding both sides of the expression and subbing in those values, but that just seems to be a long and roundabout way of doing this. There must be better...

Sorry I should have put q+1. I've changed it now though

I noticed that when you go to the resources page for English (Adv, AOS), you no longer know exactly what texts each file is about. Before it used to say eg. BNW/BR, Skrzynecki, etc. It would be very useful if it was like that as well, as otherwise you have to download each one to see which ones...

Before they ammended the Chem syllabus at the end of last year for us, it actually mentioned Lewis, and now it doesn't so I'm assuming that we don't need to know anything about it. My teacher has practiacally said the same thing.

The question is: Let a,b,c be the roots of the equation x³ + px + q = 0 where q doesn't equal zero Find the equation who roots are: a^-1(1-a), b^-1(1-b), c^-1(1-c) ie. 1-a over a etc... Let x= (y+1)^-1 therefore the new equation will be: qx³ +...

yeh Bondi ended yesterday I just realised there's like 4 separate King Lear threads- must mean most people are doing it