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Keep your chin up! ;) Only 6 or so more months and we should all be living it up like HayleeKate

Hey George, Just wanted to let you know I loved the worksheet you posted on equilibrium reactions in the Acids and Bases forum. Thanks heaps for that! I was also wondering whether you'd written any follow up worksheets on other topics from the first two modules and, if so, where I, and the...

Exactly. Don't let a minor setback like this colour the rest of the course for you. At risk of sounding too much like some motivational speaker, I'll tell you that dwelling on something like this won't help in the accomplishment of your more important objectives, like, I'm guessing, doing the...

Would you say the Success One texts are worth using? I'd think they'd only tend to shine right before the Trials and the HSC exams, after all course content has been covered, because don't they have practice papers that draw from all topics?

Sure are. The spacecraft is in uniform circular motion about the Earth, meaning that the centripetal force of the orbit is in harmony with the gravitational force of attraction between Earth and spacecraft. Now, since net forces on the spacecraft are zero (atmospheric friction, if any, is...

You serious? We've just FINISHED Ideas and our teacher's even talking about slipping a little Astro into our half yearlies (which we've just started!!!). Yeah, he's a little unorthodox in his delivery of the course... I'm pretty sure he skipped Invisible Waves completely last year and tought us...

...Nice...

z4=-z1, not -z3

I came sooo close to doing that. Unfortunately, my school hadn't bothered to float the idea of accelerating to us, and by the time I heard it was needed for Cosmo, it was too late :(

Do you have the Leading Edge Workbook? Try doing as many practice questions as you can, including Multiple Choice Qs and Extended Responses. Sometimes that can be better than writing out notes. If you don't know the answer to a question, check your text books, write an open book answer on some...

The Marginal Rate of Substitution (MRS) is a constant for a linear PPF and will vary for a curve (MRS is just the ratio X to Y, or the opportunity cost). If you like, the MRS is the gradient of the PPF (for a line), or the gradient function (for a curve). To find the opportunity cost of a...

Hey elizabethy, 2. Using, cos2x = cos^2x - sin^2x = 1 - 2sin^2x sin^2x = (1-cos2x)/2 Now, 2sin^2x = 2[(1-cos2x)/2] = 1 cos2x = 0 2x = pi/2, -pi/2 for -pi < x < pi (or, 2x = 90, 270 for -180 < x < 180) In general, the sol'n is x = 180n +- 45 (45 is used since 2x = 90, x = 45) 3. This...

MX2 - Mon 4th: Graphs; Complex Numbers; Polynomials and Integration *All in 2 hrs!!! :'(* MX1 - Tues 5th: Everything from Prelim; Applications of Calculus; and Exponential Functions Our Maths dept also tried to rope the 4U class into sitting the 2U paper on the same day until we all...

Sweet stuff, man! I sorta do the same thing, but with Lenz's Law instead! Physics: An induced EMF will flow so that its associated magnetic field opposes the change in magnetic flux that brought it on Chemistry: A chemical system will oppose any change to its equilibrium position...

I'm not an honorary "Seftoner", but I'm soooooooooo stuffed after 3 hrs of Integration by Parts and I just HAD to tell someone! OK... Catch ya

Misplaced rhetoric. The reaction is exothermic in the forward direction, therefore equilibrium will shift in the heat-absorbing, or endothermic direction, and H2CO3 will decompose to CO2 (By LCP, eqm shift to left). Pressure, in the sense of the total pressure acting on the system, and not of...

Lol, my teacher says whenever the question has a "c" in it (i.e. cos), the answer will be "contrary" (which means opposite sign, according to him) - then he started singing that nursery rhyme, "Mary mary quite contrary... blah blah" and told us to remember it that way :P

Have no frame of reference, but old school Physics sounds heaps prettier to me

Isn't Reyanaldo asking for the effect on "demand" of each of the five scenarios? Since the demand curve is fixed, yes, as azza raised, the supply curve will be the one that changes, however, the question seems to ask for the effects these changes will have on the "demand" for B. Assuming free...

Thanks for your help