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Section II booklet (ie option topic) is now personalised http://news.boardofstudies.nsw.edu.au/index.cfm/2014/4/28/Official-Notice-Personalised-examination-materials-in-a-number-of-2014-HSC-examinations

Just to throw a spanner in the works here.. I have been told that the booklets for the option topic will actually not be blank booklets anymore, they will be booklets which have set space for the questions and the booklets will already have your name on the front of them (to avoid booklets...

Pi and Sigma are two different types of bonds. Sigma bonds are much stronger. In benzene, the resonance is due to delocalised Pi electrons.

Ur probs thinking Pi bonds, not sigma

Did your teacher use the term resonating or sp2 hybridised (hopefully not that latter, cuz you really need Molecular Orbital Theory) to explain that

less simply > there is a rotor and a stator > the stator consists of three pairs of opposing coils, each connected to a single phase of a three-phase AC power supply which produces an apparent rotating magnetic field > the rotor is made up of parallel aluminum bars (that looks like a squirrel...

Keep it within the domain. Your line of best fit is only valid for the data which you have, there is no way of telling if the LOBF is valid for any points outside those given, thus it would not be valid to use it outside the points given

Not too sure how picky they are with this, but it would be water vapour which is created as a product of the combustion reaction, but this then (next to) immediately condenses into liquid water

This is true, but collisions between electrons and lattice is not the sole source of heat loss. http://ecee.colorado.edu/copec/book/slides/Ch12slide.pdf Slide 38/39 The equation can be used whenever current flows through a conductor. It is a general eqn for power loss

Yeah, don't be misled. Some sources say that Iron works well with induction cooktops due to its high resistance, which is incorrect! The main mechanism via which heat is generated in induction cooktops is magnetic hysteresis, rather than induced eddy currents. Otherwise, Aluminium (which is a...

The lower the resistance of the pot, the greater the size of the eddy current. Power loss (I.e heat) is directly proportional to current squared, the greater the current, the greater the heat generated :)

Spent over 2 hours today with one of my 2014 HSC tutoring students to consolidate some material which he had uncertainties about. Free of charge!

Yep, B is wrong for HSC sake. HSC wants us to say that for eddy currents to flow, there MUST be a closed loop for it to flow through :(

This is a case of what I like to call "HSC SEZ" HSC SEZ that there must be a closed loop for 'eddy currents' to 'flow', therefore as soon as a slit goes the full length of the ring, no eddy currents can flow, no induced magnetic field, no opposition to motion, therefore C is the answer as the...

I worked in industry during uni, but I amz teh teach0r now

Easy way to think of it -- at equilibrium, ions in lattice are all arranged uniformly, electron comes through, causes lattice to distort (thus changing the energy in the lattice) -- this energy must come from somewhere -- it arises due to the electron releasing a phonon which is then transferred...

Most recent HSC exam which asked about BCS -- no need for phonons (I think 2012?) whereas earlier exam it was in the marking scheme (I think ~2005) as our understanding of super conductivity has changed (flux pinning / quantum trapping) in the interim. So, u would expect that you would not need...

Be careful! MagLev trains require high strength electromagnets, which utilise electricity, which is generated from coal-fired power stations, which emit CO2 which contributes to global warming

Re: HSC Physics Marathon 2014 /presses F5 repeatedly

Thanks for your comments peoples :) Xin, you have worked so hard to improve this much! I am so happy to be a part of your success! :D I have had 5 students contact me to reserve spots for HSC 2016 -- if you are interested, please PM me