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Hi there, So there is a dotpoint in the astro syllabus, which talks about analysing spectra of stars to give insights into their density. So far, I have this: The density of a star can be inferred from the width of the star’s spectral lines. A less dense star will have fewer collisions...

Well, it seems like Board of Studies are now letting schools access the raw marks for externals of their students (of course, note they have pretty much always had access to the aligned external marks of their students, but not raw marks...) As a result, for the 2013 HSC, a teacher has let us...

Hi peeps, some help with this q will be most appreciated. So, I got a) out by using d/dx (1/2 v^2) = acceleration. But then when I try b), going nowhere. Tried heaps of ways. OF course, tried the normal way of square-rooting both sides of the result of part a) (well it will be negative...

Hi There, I need some advice (especially from past 4U students) So some background - basically, as we've been doing 4U maths this year, as we finish each topic and even sub-sections of each topic, our teacher gives us worksheets with all the past hscs (to like 1988) that are on that topic...

A State Ranker's Guide to Economics (Part 1) Introduction So, after requests from some BOSers (e.g. enigma_1 and hawkrider) for a guide to Economics to be written by me, I have succumbed to their request. Haha :D And, also, before I begin, it has been many months since I did Economics, so if...

Okay here it is: thanks in advance.... http://postimg.org/image/no9y9kf6v And please just give me the complete answer, not just a hint, because I tried it a lot and am not dumb. Thanks!

On average, what raw mark is needed for 90 aligned hsc mark in Physics? And what raw mark is needed for 95 aligned hsc mark? And also, out of curiosity, how bout for like 98 aligned? Thanks!

Can someone please explain donor and acceptor levels in regard to band theory? Thanks!

Here is my question (and it is a question quite a few of my friends at various schools have): How much of a benefit is it to have two relateds in your essay vs. one WHEN they ask for "at least one related"? Because I was thinking about how my teacher said they're moving towards asking for...

Hi, This atar estimate is for a friend at another school (usually ranked within top 5): English Advanced --> 85 /180 English 3U --> 30 / 70 Maths 2U --> 60 / 110 Maths 3U --> 100 / 150 Chemistry --> 55 / 120 Physics --> 65 / 120 Thanks a lot guys!

Okay, so my school is consistently a top 3 school, and I am asking for a new atar estimate based on my updated ranks received from school which now account for HYs. my ranks are: english = 20/200 maths 3U = 4/180 maths 4U = 11/110 latin 2U = 6/19 latin 3U = 5/16 physics = 25/120...

Refer to Poll (above) for my main question. Reply below with more thoughts if you wish. Thanks! :) BY THE WAY, this is the FULL question for the poll: In your opinion, which of these is the best degree to do at uni, taking into account factors such as teaching quality, content covered...

Hi, Quick question on this table: when it talks about "HSC Mark", which "mark" is it? Is it our the average of our raw moderated internal mark and raw external mark? If so, then how can I possibly use this table? etc. I think researching more into this may have confused me. Anyway, here's...

these two people go to a top 5 school: Person A: a) English Advanced --> 10/200 b) English Extension --> 15/90 b) Maths 3U --> 65/170 c) Maths 4U --> 45/90 d) Chemistry --> 20/120 e) Economics --> 20/110 Person B: a) English Advanced --> 40/200 b) Latin Continuers -->...

school consistently ranked in top 5 english advanced = 75/200 maths 3U = 6/178 maths 4U = 12/109 latin 2U = 3/25 physics = 30/119 economics = 1/121 thanks :)