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Here, I did it in excel. I dont know if its of any use...

To add to that: General equation for a quadratic x^2 - (sum of roots)x + product of roots ax^2 +bx +c = 0 let roots be A and B A + B = -b/a AB=c/a

Yes, that is correct. Clearly it is not simple to describe how the theory that energy is quantised explains black body radiation curves... I have read that Planck used statistical mathematics of a very high degree to come up with a formula to explain the curves. For example take a look at...

That would include geometry of parabola, quadratic identities and questions on the discriminant, as well as relationship between roots and coefficients...

Nice work. A bit similar to the KKK member who get jailed yesterday for the death of those three civil rights workers in mississippi in the 1960s.

You should be writing about 2 and a half pages (in teh hsc they give you two, but u should go over that slightly) in my opinion to get full marks. You should refer to the source but dont just say "the source tells us this and that" constatnly, you should interpret what its saying as well...

Umm, Im not sure, but your best bet is to try wikipedia, just search up the names. e.g. http://en.wikipedia.org/wiki/Ngo_Dinh_Diem go down to teh bottom and click on "listen"

You could check in the Resources section, there might be some info there. Here are a couple of other good links: http://en.wikipedia.org/wiki/Hitler_Youth http://www.historyplace.com/worldwar2/hitleryouth/index.html

Yeah, its even worse than the Planck and black body radiation dotpoint (thats only an identify dotpoint! lol)...

For assess questions basically you talk about a number of reasons and then "choose" a reason/reasons which are most important. For example take last years HSC question "Assess the view that the collapse of the Weimar Republic was primarily due to the appeal of Hitler and his Nazi Party." In...

You should usually divide first before taking the log of both sides. ANyway this is how you do it: 2e5t = 75 e5t = 75/2 ln e5t= ln (75/2) 5t= ln(75/2) t = [ln(75/2)] /5 = 0.725 to three significant figures

You use the right hand rule...to determine the direction of the force. To determine the direction the charge moves they would have to give you the direction of the force. Can you please post an example, maybe it would be easier to understand then :)

put a magnet in and out of a coil...you will see that the current produced in teh coil flicks back and forth if its connected to an ammeter. Hence AC is induced.

Yeah. The Year 11 Version isnt as good as the Year 12 version though. But they are still very very good.

Explain why, using physics principles, many motors have resistors which need to be switched on when the motors are warming up.

I dont blame you, but I guess you only really know from people you talk to who are from that region

Yep, thats clearly the better method esppecially when dealing with negative powers.

Hey it is too! lol

Its outside the domain, try inverse sine on that and you will get a mathematical error ;)

it works.... u = (1-sqrt5) / 2 sin x = (1-sqrt5) /2 = -0.66.... multiply by negative 1 and add pi = 3.80 the other solution is just 2pi - 0.66.. = 5.62