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Re: HSC 2013 2U Marathon It is a semicircle with a radius of 3. Domain: \ -3 \le x \le 3 Range: \ 0 \le y \le 3

re: HSC Physics Marathon Archive Ohhh I see what I did wrong. Misread the question thinking 3.28 was given as a distance (i.e. light years).

re: HSC Physics Marathon Archive 3.28 = \frac{4.367c\sqrt{1 - \frac{v^2}{c^2}}}{v} 3.28^2v^2 = 4.367^2c^2 - 4.367^2c^2 \times \frac{v^2}{c^2} 3.28^2v^2 + 4.367^2v^2 = 4.367^2c^2 v = \sqrt{\frac{4.367^2c^2}{3.28^2 + 4.367^2}} v = 2.40 \times 10^8 \ m \ s^-^1

Not sure about last year, but in general it varies from 48-51/70

Explain the significance of booster injections in the application of vaccines.

Hmm not too sure then.

I don't think we're allowed. We were marked down for our trials if the scientist wasn't real. Luckily Alan Hemmings just happened to be an Australian environmental chemist. :)

Good work! Also PFC's, although they can carry a lot of oxygen, they can't release it.

It is but it isn't :L The original leaned more towards how the research has impacted scientific understanding whereas the other one is about why there is research into it in the first place.

My mistake. Yeah I think I worded the question too weirdly. What I did mean was: Explain why research into the production of artificial blood is required. In this case, fionarykim's answer is correct. However if the question was actually "explain why research into the production of artificial...

For Biology I'm thinking it will either be something about evolution, quarantine or genetic engineering. For Chemistry I think effects of sulfur/nitrogen oxides or conditions for the Haber process. Not too sure about Physics hmm.

Re: HSC 2013 2U Marathon \int \frac{1}{xlnx} \ dx \int \frac {1}{x} \times \frac{1}{lnx} \ dx \int \frac{\frac{1}{x}}{lnx} \ dx Since \ y = lnx, \ then \ y' = \frac{1}{x} \therefore \int \frac{1}{xlnx} \ dx = ln(lnx) + c

8th of November: School ranks 18th of December: HSC results 19th of December: ATAR

Explain why research into the production of artificial blood has been central to present scientific understanding.

Looking at the raw mark database - ADV English: 77/100 Business Studies: 81/100 Economics: 84/100 Biology: 79/100 General maths isn't listed.

Not necessarily. How did you relate time and place though?

I talked about the complexity of choices and how Gertrude's choice to commit incest in order to satisfy Denmark's desire for a warrior king is representative of the corruption of her religious path, especially in a time where religion was the focal point of society.

The 2012 exemplary essay for Hamlet was only 4 pages.

re: HSC Chemistry Marathon Archive Hmm good question. I would assume it was different to strong bases since the reaction wouldn't involve the standard hydronium and hydroxide ion reaction but I'm not too sure about weak bases.

That was the 2009 paper: http://www.boardofstudies.nsw.edu.au/hsc_exams/hsc2009exams/pdf_doc/2009-hsc-physics.pdf