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I just realised why they added 1 If an integer is MORE than, it has to be MORE than by at least one. If you add 1 to it, it can be MORE than or EQUAL TO.

The Carrotsticks guy wrote solutions which use a different proof. http://community.boredofstudies.org/1022/mathematics-extension-2/293731/2012-hsc-extension-2-mathematics-solutions.html Here's the link to his thread. Granted, I don't really understand his proof either. With the BOS proof...

Mate, literally just did the same paper and was wondering the same thing! I may be wrong (often am) but I'd think it isn't necessary as the question give you the condition. If the question didn't have the condition, then you'd probably need to prove that that was a condition. IMO (which holds no...

Everyone here's probably studying for that arduous 2u test.

Mostly correct stuff but the setting out should be improved on. The question starts by asking about the differences in structure so that's what you should begin with. Oxygen is a non-polar molecule with a linear structure, with one double O=O covalent bond. Ozone is a polar molecule which...

If it doesn't specify, go with what's easiest. In this case, inflation has lots and lots of negatives that can be easily elaborated on, whilst it lacks quite a lot in positives. If the question was worded explain two, just jump to the negatives. If it was worded compare two, then going one...

Bumping because neither of these questions received answers.

Thanks! I'll be sure to include that in my list then.

I thought that was an old theory that was disproved when stagflation hit in the 70s. I get the cyclical unemployment would decrease but Australia is already pretty much at the NAIRU so it wouldn't necessarily help unemployment

Tax Governments can use a tax on carbon emissions to try achieve environmental sustainability. In 2012 the Australian government imposed a 'carbon tax' on carbon emissions. The tax initially started at 23c/tonne and was due to raise by 5% each year until 2015 in which the tax would be replaced...

I'm not mreditor, but I highly doubt they'd allocate two marks to explaining a positive impact of inflation in the HSC.

When you say policy options, do you mean like 'market based' and 'direct control'? Or can I answer 'Tax' and 'ETS'?

Nice answer, but probably a 3/4 at the moment. No you don't need to define the term in the short answer unless it specifically says to (my teacher is a current HSC marker and said this). The positive impact is a little weak but that's mostly because there are very few positive effects. When I...

Bump. Cmon guys where are all your economic (animal) spirits

In all my assessments this year I expected for radioisotopes and battery cells. I studied them super hard the night before and knew all my equations, was more prepared for these than I'd been for any test in my life. After the topic test and half yearly didn't have, I was certain the trial...

I thought that in equilibrium, pressure changes and temperature changes were all gradual. I thought the only thing that would be an instantaneous change would be to add one of the reactants/products or to remove one. I'm a little confused could you please clarify?

Ok I think I get that thanks :)

Also, I'm just wondering... wouldn't 11 be A or D not B or D? Larger volume = lower pressure. More moles of gas on LHS therefore equilibrium position shifts to LHS which would have more moles of CO2

first equation doesn't balance

I was under the impression that for the past 5 years or so, 70%+ is almost guaranteed e4