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So my question is, why was there any debate as the observations from the paddle wheel experiment seem highly conclusive. Yes, but by the same token, the observations of no deflection in electric field, no measurable magnetic field associated with the cathode rays and ability to penetrate thin...

All G ppls, that's what this forum is for! Don't know why that piece of info isn't in textbooks though. It's pretty useful!

It's not Rutherfords experiment! He used alpha particles. Hertz passed Cathode Rays through thin gold foil in 1892

There were a few other things the HSC wants you to say: Cathode Rays passed through thin gold foil - how could a 'particle' pass through an interlinked arrangement of gold atoms if atoms are the smallest thing known in the universe (as they were back then), therefore must not be a particle...

Please see this part of my post This is, after all, a HSC site, correct? #hscsez :)

Increasing surface area would increase photocurrent if the increased surface area allows extra photons to be absorbed, which we would assume that it does. Your teacher is correct, the way which we look at it in the HSC, is that frequency has no impact. If you think about it from the view point...

Transfer: Energy moves from one object to another (but form of energy remains the same) example, two cars collide and Ek gets transferred from one car to the other. Transformation: Form of energy changes (usually within a device), example a light globe transforms electrical energy to heat +...

Both Saturday classes for HSC 2016 are now filled. I may run a weekday class if there is sufficient demand. Please contact me if you are interested in a weekday class (Day of the week is flexible)

Another one of my non-selective students got her result for her last assessment task back this week :) BOOM!

An understanding of this is far beyond the HSC course. It's irrelevant! On a side note: http://www.sciencealert.com/scientists-have-discovered-a-new-state-of-matter-the-jahn-teller-effect

If I get 10 likes I will post the answers tomorrow*. I know I have them somewhere!! Awesome stuff with all this sharing, Dan! * I am actually kidding, I don't want the likes, but if I can find them, I will post solutions :)

Salts are formed via neutralisation rxn: Acid + Base --> Salt + water Seeing as the salt is slightly basic, that means that the reactant base is stronger than the reactant acid. Therefore, HCN must be a weak acid in solution (I.e., answer is A) Alternatively, this about it in terms of...

Really? No way. The answer should be A. It states that the wire is of length 30cm, not that the width of the field is 30cm. If you were told that the width of the field was 30cm and the wire was within it, then fair enough, l should be 0.30m. But, seeing as the length of the wire is 30cm and...

Really? C? Surely a typo

Have received some marks back from my non-selective students for their Half-Yearly examinations. Congratulations to the following students who achieved first place in their school and a mark of over 90% in their half-yearly examination. - Joshua.H (Kingsgrove North) (70/75) - Jason.P (Bossley...

Nearly full for HSC 2016 starting in September 2015. Only two spaces remaining.

For HSC sake, EMF = Potential Difference = Voltage We use all 3 interchangeably

Re: HSC 2015 3U Marathon Next value (I think) given below and hint for denominator and numerator

re: HSC Physics Marathon Archive The marking criteria has changed for superconductivity, especially due to recent advancements in understanding (i.e., flux pinning or quantum flux trapping) I really doubt that big questions of superconductivity will arise. They USED to want you to talk...

For HSC sake, we must say that it 'brought into question' the existence of the aether Einstein himself said the following: "The next position which it was possible to take up in face of this state of things appeared to be the following. The ether does not exist at all. The electromagnetic...