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Census date is 31 March, so 2 weeks after that - wait till the end of April until getting worried.

Re: Acidic, basic and neutral salts - EasyChem answer 1) [H+][OH-]=10^-14, but we know [H+]=100[OH-] Thus we have 2 equations in 2 unknowns, which can be solved by substitution: {100[OH-]}[OH-]=10^-14 100[OH-]^2=10^-14 [OH-]^2=10^-16 [OH-]=(10^-16)^0.5=10^-8...

Very nice explanation from marmsie, thankyou.

They can change, but i would'nt think they do often...

Possibly, although there are other considerations, the main one being cost (crude oil is still cheaper, as a source at the moment, due to conversion costs / time); also a considerable amount of energy is needed to convert biomass into ethanol in the first palce, which does cause environmental...

a) is correct, balanced and includes states. Well done. b) First one is: Mg(s) ---> Mg[2+](aq) +2e[-] [OXIDATION - Loss of Electron(s)] Second one is: 2H[+](aq) + 2e[-] ---> H2(g) [REDUCTION - Gain of Electron(s)] It is clear there has been a transfer of electrons - Mg, which...

In 2nd sem you'll be competing against actuarial studies students.

A bit off-topic, but the MX2 site he is referring to is possibly http://users.tpg.com.au/nanahcub/me2.html And please share :)

Convential current is usually used, when someone says just 'current', I.

Some old units have people/planet designations, for example STAT170.

How about we give the '10er's a go to answer/ask these Q's...

I've provided a {very solid} solution to the initial problem; to find the probability you are now asking for, you need only amend my method in particular parts. Have a go yourself ...

Required Probability = P(group A is selected AND both chosen people are boys) + P(group A is selected AND both chosen people are boys) =P(group A is selected )P(both chosen people are boys, given group A is selected) + P(group B is selected )P(both chosen people are boys, given group B is...

1) s=ut+0.5at^2 2) v^2=u^2+2as 3) s=ut+0.5at^2 4) s=ut+0.5at^2 [rearrange] 5) s=ut+0.5at^2 [rearrange, solve resulting quadtratic equation (in t) using quadratic formula, only accepting the positive value] 6) s=ut+0.5at^2 NOTE: Here i have used common physics notation, and additionally...

That's O-Week.

Re: outline the essential problem with light, the aether and the principle of relativ Be careful - the Principle of Relativity did not state this, it states that, regarding an inertial frame of reference, without rteference to an outside frame of reference, one cannot determine whther theya...

Re-enrolment in units / class registration is now open again ( a little early) on eStudent, in case anyone was interested.

I do not beleive this is part of the HSC Syllabus...or is this prelim? if so, i still do not quite understand what you are asking...

Enrolment already started, and so did class registration, however they have been closed for the past week or two. They will re-open on 8 Feb, and yes classes start in the week beginning 22 Feb.

Actually, all transfer info is found here: http://www.reg.mq.edu.au/undergrad/current/currentstudents/Table%202.pdf. To trasnfer to the B Com (not prof. ACCG) you need: at least 12 credit points with an overall GPA of 2.0 i.e. you can trasnfer after completing 4 units and at least...