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does anyone have the simplified proof reasons for circle geo handy?

When a diode is forward biased, current is able to easily flow through it. ( N----> P within diode (electron flow direction)what textbook says ) When a solar cell is exposed to light and an external circuit, current is able to flow. ( P --> N within cell (electron flow direction) what...

I'm going to be starting to write up some applications soon, does anyone have any tips on how to stand out?

here's a good question from my test today if you want to have a crack at it, its not very hard if you find the trick. <a href="http://www.codecogs.com/eqnedit.php?latex=the~equation~x^3-kx^2@plus;k^2x-1=0~has~roots~a,b,c\\ find~and~equation~with~the~roots~\frac{a}{bc},\frac{b}{ac},\frac{c}{ab}"...

I asked this question before, but I was a bit vague in my question and nobody seemed to understand. As proved, the parametric equations for a regular hyperbola are x= asec(theta), y= btan(theta) When referring to an ellipse, to have the major axis being along the x axis, or the y axis just...

The furthest we learn about roots of multiplicity in the HSC syllabusses is that if the power is even, the curve will bounce, and if it is odd the curve will have a horizontal inflection point. I have always wondered, as far as having multiple roots at that point on the graph, what else is...

seeing as multiple choice are new, and BOS in their wisdom have only provided 5 practice questions per stream of math (or so i am aware of). This is a thread to share MC questions so people can have a greater exposure to questions. I will upload mine when I do my half yearly in 2 weeks

here's a good maxima and minima question to test your ability. the cost of running a car at an average speed of v km/h is given by c=150 + (v^2/80) cents per hour Find the average speed, to the nearest km/h, at which the cost of a 500km trip is a minimum.

on a scale of 1 to mechanics, how much does physics help with mechanics?

Everyone says state ranks are solely based upon external marks. I don't believe this to be true, there must be another determining factor as to who gets what rank. This is because, for example, within the HSC mathematics top 20 last year, there were 7 individual ranks within the 20. This cannot...

Zn(s) + 2MnO2(s) + 2NH4+(aq) + 2H2O(l) --> Zn2+(aq) + 2Mn(OH)3(s) + 2NH3(aq) thats what ive got, should I include the chlorine spectator ions or not?

I know this should be in the buy and sell category, but i guess this might be the best place to find one. If anyone has a recent (09-10-11) excel success one MX2 past paper and solutions book they want to sell I will happily buy it off you, just PM me if you have one :) Thanks

If we are told to graph 1/f(x), given f(x) in graphic form, why is there no point of discontinuity on the 1/f(x) graph at the point where there is a vertical asymptote in f(x)??

When a catalyst activates a polyethylene monomer it bonds with it, and this causes a continual chain of ethylene monomers. the reaction is complete when 2 of these chains react together, yet how is the catalyst broken from each end of the chain? because in my textbook it shows the reaction...

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If the experiment is burning an alkanol in a spirit burner and measuring the change in temperature that results in a certain mass of water, is it best to use a flask/container with a higher or lower specific heat capacity and why? also are there any other suggestions to maximise efficiency of...

Anyone have an outline of the contribution of Liberation Theology to Christianity? would be greatly appreciated :)

Any suggestions on the hardest projectile motion and/or binomial expansion questions in the HSC ext 1 papers from years gone?

I was thinking about how to attack this exam, and i though that during reading time i would look at Q7 and possibly Q6, and if i could definitely think of a way to solve part of those question i would do it straight away and then move back to Q1 onwards, any thoughts?

Are state ranks solely based upon HSC raw test marks? or does a form of scaling apply depending upon marks in related subjects etc.?