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(I'm creating a new post as I am no longer offering Physics and Chemistry tutoring, however, my old post along with testimonials/recommendations can be viewed here...

Hey all, My name's Jaden and I completed my HSC in 2015, receiving an ATAR of 99.90 and a state ranking of 3rd for Physics. (Currently I'm enrolled in my 3rd year of a Bachelor of Science (Adv Mathematics) at USYD). My marks for my HSC subjects were: English (Advanced): 91 Maths Ext 1: 100...

Kingofacting has helped me to prove this for real numbers a_n and b_n, but not integers... can someone shed some light?

Calculus & Analysis Marathon & Questions This is a marathon thread for single-variable calculus & analysis (mainly real and maybe complex analysis). Please aim to pitch your questions for first-year/second-year university level maths. Excelling & gifted/talented secondary school students are...

Hey wonderful people of BoS! Over the past month or so, I’ve had quite a few people ask me for tips and advice regarding how to succeed in HSC Physics. Unfortunately, I don't have quite enough time to answer each and every person who’s asked me for help, so I figured it’d be better if I wrote...

^ So far I have: As they are non-rechargeable, they end up filling up landfills Excess zinc in the environment may harm living organisms The acidic electrolyte NH4+ may harm the environment when disposed of What else is there that I could possibly include? Thanks

The result I'm referring to is the SHM identity: v^2 = n^2(a^2 - x^2) Is it okay to pull out this formula during the HSC exam, without proof?

Found this in 2009 HSC. Can someone please explain to me what the terms 'donor level' and 'acceptor level' refer to? I've never heard them before. Thanks

1. How important is it to follow the directions during the option section "answer parts (a) to (c) in writing booklet 1, etc"? I'm planning to write quite extensive responses and am unsure I'll be able to fit it all in 2. Do they scan the exams in colour or in grayscale? If anyone could...

When describing a procedure to prepare an ester by refluxing, it is important that the source of heat be a hotplate (instead of a Bunsen burner)? It is apparently too dangerous to use a Bunsen burner, due to the volatility and flammability of the alkanol, and the naked flame of the burner. I...

I was doing the 1998 HSC for Extension 2 and this question popped up. Parts (i) and (ii) were easy but (iii) is a lot more tricky. The marking notes explicitly state that the inequality in (ii) must be used, but I can't seem to figure out exactly how it should be used. Can someone help with this...

Could someone please help me with this question? The answers say 2/7, but they aren't very enlightening as to why this is the case. Thanks :)

Could somebody please point out the flaw in my method for this question from Terry Lee? If it's hard to understand from the picture, my idea was to choose 1 ball from each colour set (hence [11C1]^4), and choose 2 more from any of the remaining 40.

Advanced English Trials - 98% (rank 1/44) - CSSA Overall - 95% (rank 2/44) Maths 3U Trials - 100% (rank 1/8) - Western Region Overall - 99% (rank 1/8) Maths 4U Trials - 99% (rank 1/2) - Western Region Overall - 98% (rank 1/2) Chemistry Trials - 98% (rank 1/10) - CSSA Overall -...

I'm a little bit confused about the binding energy per nucleon graph - I understand that a greater BE/A results in a more stable nucleus, However, what I'm confused about is fusion and fission, and why they release energy. For example, if Uranium splits to form products with an overall higher...

I've come across some questions about galvanic cells where one of the half cells involves a platinum electrode in an acid solution, with hydrogen gas bubbled over the top of it. I'm perfectly happy with this scenario if the hydrogen half cell is the oxidation cell: the hydrogen gas oxidises...

The following question was in the JRAHS 2011 Trial: Because the HCl acts as a limiting reagent when the mass of zinc > ~1.1g, I figured it would be best to draw a straight line of best fit that went through the origin. However, the answers have a curved line of best fit which did not go...

Hi everyone, I realise this is probably a simple concept which I just don't seem to be able to grasp very well. This was the question which got me thinking about it: https://imgur.com/tqbIeIi Basically, I'm confused about how I should understand calculating the volume in part (ii) in...

I have read many sources concerning the relativity of simultaneity, and have come to the following conclusion: If matches are struck (or an equivalent event) inside the train, the observer on the train will see the events as simultaneous whereas the observer outside will not see them as...

https://imgur.com/lLxdv2l I have been stumped with one simple part in part iii: both of the solutions that I have looked at state: "similarly, CE = 2rcosBsinA" but I can't seem to work out how to actually show this. It's probably something heaps simple that I've overlooked but I'm getting...