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Had first Ext 2 Lesson today lol, just introduction to Complex numbers and their basic operators (addition, subtraction etc). Hopefully it will get better though, looking forward to the rest of the course. Also my teacher told me not to read ahead or learn ahead, saying that its very important...

Re: The Loaded Dog: HSC exams - Sydney Morning Herald Im sorry, but most of the pressure that has been applied to parents in their times under the academic spotlight has affected their ideology of how academia is now today. What Im saying is that during their time it was nigh on impossible to...

Ah, thank you for directing me

Well where would I get the hsc papers pre-1995 because I cant find them on google and I would think they should be free since its a public item? (I shouldnt need to buy a stupid book just to get papers that should be public)

2U Exam is on 22nd of October and 24th is 3U. Can anyone give me me a ratio of past papers to do 3U : 2U (or a number for both) A seperate ratio for normal trials (preferably a number) And a ratio of how many hsc exams for 3U and 2U (hsc exams as in past hsc papers etc) Keep in mind that Im...

One way to do it is (might not be very elegant but..) v=\frac{5}{\sin 2x} \\ \frac{dt}{dx}=\frac{1}{5}\sin 2x \\ \\ t=\int 0.2 \sin 2x \ dx \\ t=\frac{-1}{10}\cos 2x For all real time t, t > 0 -0.1 \cos \2x > 0 \\ \therefore \cos 2x <0 \\ \\ \therefore $For all x$ \ \ 0<x<\pi / 4 \\ t<0...

16b) I dont know how thats a question because it is painfully obvious that its a tangent if P and Q are the same point, but for computational reasoning: m_{PQ}=\frac{ap^2-aq^2}{2ap-2aq}=\frac{p+q}{2} \\ \\ q \rightarrow p \\ m_{PQ}=p \\ \\ y'=\frac{x}{2a} \\ x=2a[ \\ y'=p=m_{PQ} 17. Im...

Yeah I very rarely make notes for my subjects, but I was thinking whether to try making notes for this HSC year because I want to put as much effort as possible. Is making notes a good idea in general? Or should I use that time to just keep reading the book and doing questions?

$Conditions $ \ \ t=0 \rightarrow v=0 \ \ x=+5 a) \frac{dx}{dt}=4x \\ \therefore \frac{dt}{dx}=\frac{1}{4x} \\ \therefore t=\int \frac{1}{4x}dx \\ t=\frac{1}{4}\ln x + C \\ 0=\frac{1}{4}\ln 5 +C \\ \therefore C=-0.25\ln 5 \\ \therefore t=0.25 \ln x -0.25 \ln 5 \\ 4t=\ln x - \ln 5 \\...

Our school does Astrophysics, is it as bad as Quanta and Quarks? (I like quantam physics as well if thats what that topic is about). Also on average how much in terms of percentage is the Chem and physics test calculation/problem solving based?

Is it same for Physics as well? :/

You will be tested on everything you learnt in y11 and y12. TECHNICALLY you never need to know what Pascal's triangle is. But it really helps in the understanding of what the Binomial Theorem is. In Pascal's triangle, how to form it is easy, however it can go really deep in connection with...

If you are doing 2U you will never need Perms and Combs, if you are doing 3U you will most likely never need tree diagrams unless they ask for it or its avery simple question. Permutations means the amount of arrangements, that is the amount of ways you can arrange a set. Combinations are the...

Q3: \log_{10} {k}=\frac{\log_k k}{\log_k 10}=\frac{1}{\log_k5+\log_k2} Q4: The amount of water being put into the jug is in a constant rate, so dV/dt is constant. The meaning why this is so, is 3U (parameters), but its just there to tell you that there are no annomalies when they fill the...

First one is correct, second is not. Just assume another chemical equation with k grams of CO as the product and excess O (assume incomplete combustion etc etc) I probably should of made that clear

$If an unknown quantity of C reacts with excess $O_2 $ k grams of $ CO_2 $ is produced $i) Find the mass of Carbon in terms of k$ $ii) Find the mass of extra Carbon (in terms of k) needed to produce k grams of Carbon Monoxide$

Ok, so what are the conditions for it to go over the fence and still reach 45m range? It is, when x=40 y must be greater than or equal to 2. While a is 15 or 75 degrees. So lets find the time when x=40 (keeping in mind V=30 and g=10) t=\frac{40}{30\cos \alpha}=\frac{4}{3\cos \alpha}...

Well in general, we need to get straight down to earth about what the question is asking. The question asks us to find k and nothing else with the given equation and the condition that roots are equal. So the objective is to find k. Well since its a quadratic we know we can use sum and products...

We are doing mathematics here, although you want to take a non-rote approach to maths, asking yourself these kinds of questions will lead to you roting everything (if thats what you want thats your choice). In mathematics sometimes you need to do something different, with enough practise and...

Ah yes, I was a bit too rash in simplifying, turns out I divided by zero when cancelling out. Real solution: \frac{(k+1)^2}{4}=\frac{k+1}{4} \\ \\ (k+1)^2-(k+1)=0 \\ \\ (k+1)[k+1-1]=0 \\ k(k+1)=0 \\ \\ k=0, -1