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Re: HSC 2015 4U Marathon i. a=kvx dv/dx =kx integrating gives: v=k/2(x^2 + d^2) v=dx/dt integrating gives: x=dtan((2dkt+pi)/4) as x->inf, (2dkt+pi)/4 -> pi/2. And rearranging gives required result ii. x=sqrt((U^2 -B^2)/e^-kt/B -1) +U^2), where B=d^2 -2U/k as t->inf...

If I don't know the states of matter for a question should I write them or not (ie. do you lose marks for incorrect states if the marking for that question doesn't actually require states?)

This is my understanding of it: So for the corrosion of an iron pipe for instance the following occurs: 2Fe(s) -> 2Fe2+(aq) + 4e- These electrons are forming iron hydroxides: O2 + 2H2O +4e- -> 4OH- Applying a voltage causes the water to lose electrons at the inert anode: 2H2O -> O2 + 4H+ +4e-...

I could very well be wrong, but I would have thought: 1 - using right hand, thumb is direction of plate movement facing right, fingers are direction of field lines facing into page, therefore the current is moving upwards (palm) in the magnetic field and then in an anticlockwise direction (so...

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I'm not sure what it is, I think I might have a tendency to dwell on questions I don't know. And I only just started doing past papers a few days ago. But I did the 2010 HSC exam the other day and I ran out of time but just kept going and I got out all of question 8 (except part a :p)

Does anyone have some advise for how to actually finish an Ext 2 paper in 3 hrs :confused:? Because most of the time I start doing question 8 with very little time left...

I think you can! At Melb uni you can have a maximum of six breadth subjects which you could fill with psychology tracks such as these: - https://handbook.unimelb.edu.au/view/2012/%21065XX-BRDS%2B1124 - https://handbook.unimelb.edu.au/view/2012/%21065XX-BRDS%2B1136

Why not? If you find it too difficult then drop one (or both of them) at the end of Year 11. But don't pick them just for scaling...

An overall contractionary fiscal stance can still have expansionary policies present.

Hi, Seeing as how economics majors at university don't require HSC economics as a prerequisite, I was wondering how long it would typically take for universities to cover the Yr11-12 content? A semester? A year?

Thanks!

Hey so I was wondering if anyone could say whether or not I can do the working out that I do for volumes questions... Eg Q. Consider a shell of inner radius x, outer radius x + δx, and height y. In textbooks, I see them go: δV=pi( (x+δx)^2 -x^2)y and then by expanding and 'ignoring' the (δx)^2...

I think you could probably discuss both (or just one of) how the composers represent political motivations and actions of governments through the use of textual devices (eg. how would the composer demonstrate that a government is acting for their own self-interest?) and also how composers...

http://en.wikipedia.org/wiki/Proportionality_%28mathematics%29

The media is tending to convey that the budget has completely changed trajectory from last year, which wouldn't be aided by mentioning policies that have been retained from last year's budget.

Re: HSC 2015 4U Marathon Can only do iii atm (my solution could be wrong...): \frac{x^n+1}{x+1}=1-x+x^2...+(-1)^{n-1}x^{n-1} \therefore J_{n}=\int_{0}^{1}(1-x+x^2...+(-1)^{n-1}x^{n-1})dx-\int_{0}^{1}\frac{1}{x+1} J_{n}=\sum_{j=1}^{N}\frac{(-1)^{j+1}}{j}-ln2 $Using the ii inequality, as N...

Re: HSC 2015 4U Marathon $Show that if n is a positive integer, then for all$ \ x>0: x-\frac{x^2}{2}+\frac{x^3}{3}-...-\frac{x^{2n}}{2n}<ln(x+1)<x-\frac{x^2}{2}+\frac{x^3}{3}-...+\frac{x^{2n-1}}{2n-1}

Ok thanks :)

Mechanics. But how many should I do? 2 a week?