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I had one a month or 2 ago on Q2Q. it was basically a research task that was assessed by a written response in class. the topic hadn't been taught in class yet, so we were given a list of syllabus points being assessed and we had to research them. they were basically all the ones related to...

Yes. we had to write down our procedure. and at the end we had to discuss how a more accurate measurement could be made. however as long as you understand the procedure and how the experiment works, and if you're only being assessed on the written component of the task, then i consider my way...

Yes. What blackjack said. Think about it as if there isnt 1 neutron released from each fission then eventually there will cease to be any reactions occuring. Obviously, in order for a nuclear weapon or sustained nuclear reaction (power generation) you need a critical mass of more than 1...

back near the start of the year we had one. we werent told what it would be beforehand, so we couldnt really study for it. determine g by letting water drops fall from a separating funnel (think thats what its called - it drips water at an adjustable rate). we had to adjust it so that as one...

in conventional current don't think of it as holes, think of it as positive charges moving - ie. the protons moving instead of the electrons. we now know that this isnt the case, but back when faraday did his work he assumed that it was the positive charges that moved. you can state an answer...

well i always assumed they were normal subjects but today i heard that legal was capped too. i dont know how true this is tho, so i figured someone might know for sure. there must be information somewhere that says what subjects are capped - it seems pretty unfair of them not to tell us...

can anyone tell me what the caps are for subjects? i know that general maths is something like 80%, but i heard today that legal studies is capped too. can anyone shed some light on this? or tell me a site that has this info?

well... lets just say that i used to phys + chem, now i only do phys. i think that was largely due to having a bad teacher, but when it came down to it i think chem was still harder. i think the reason that i find physics easier is that there are set rules and these apply to just about...

im just wondering, in the parabola parametrics when we get a question asking us to prove that SP=SQ (where Q is the point where the y-axis and tangent at P meet), can we just use the SP=PM property of a parabola? i would have thought this is sufficient but the textbooks im using show the full...

try thinking about the forces involved... while a force acts there will be acceleration, but we know that the motor will not continue to speed up infinitely - it will reach a maximum at some point. as the speed increases, the back emf will increase accordingly, so eventually the back emf will...

quick question... had my trial yesterday and i was sooooo surprised how easy it was... hadn't studied nearly enough and yet answered everything with reasonable confidence. anyway, one of the multiple choice questions caught me out and it's bugging me now it was something along the lines of two...

i understand that we only have to know what is in the syllabus. what i meant about the universal motor was that since it can run on both dc and ac power, it could probably be included in a question on either, so would it be worthwhile reading up about it. for people that havent heard of it, it...

to what extent do u guys think we need to know about AC motors? textbooks have a lot on pros + cons of induction motors, but the syllabus doesnt seem to ask for it. also, universal motors arent mentioned specifically, but would you say that since they can be run off both a DC and AC power...

I think I have a vague recollection of talking about this in class. I'm sure there must be a reason for it always being stated in this way. Underthesun - I think you might be right. While the speed of light remains the same, because it is bounced around off the atoms within the matter it...

I've been going over my notes for the space topic, and i noticed that very often, when the speed of light is given it's stated as being in a vacuum. If the speed of light is constant, why is this so?