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Very astute Rench ;). B was just a far safer answer IMO. It's the property of having to many neutrons and protons that makes a lot of the larger elements radioactive I think. I suspect it might be because the EM force has a long range so the electric field of each proton affects every other...

Using the definition from D you would probably call S2- radioactive. The # of electrons =/= # of protons, also the nuclear properties of an element are independent of its chemical properties. At a stretch you could go for D but I would be inclined to say that it is incorrect.

Use muon 'cause muons aren't mesons. A Muon is one of the fundamental particles in the Lepton family (along with the electron) - you can think of a muon as being like a fat electron :p. Mesons are composed of quark/anti-quark pairs, whereas a muon is fundamental in itself (for now at least), so...

Goodo, I was hoping that would be the case. I was thinking that I could just teach myself the first year stuff (given that I would have two years to do so) and then ask if I could start with some higher level units. Mind you, this is in my fantasy future where I actually get into the course in...

Heh, you can fit far more mathematics into a BA than a USyd BMedSc. Besides, the chances of me getting 99.95+ are close to zero, especially considering the number of stupid arithemetic errors I made on the ext. 1 paper.

Both physics and chem are watered down. It seems as though they're being used to condition us and help us develop a social conscience. Meh, at least the concepts in physics are interesting to think about.

These are links to a whole lot of prac write ups which include videos of the pracs being performed. Might be handy for those of you who (like myself) have either missed pracs or not payed attention. Hope it helps: Distinguishing between alcohols using potassium dichromate Testing for...

I just discovered a website which is going to save my ass from the amount of pracs I either don't remember or never did. It has a prac write up and a video of the prac for each: Reaction of Cyclohexene with Bromine and Permanganate Acid catalyzed Esterification - Test for Water (formed in...

Haha, I think you're on 4U withdrawal.

If I get into UNSW arts/med then math will probably be an extracurricular pursuit for me (unless they were to allow me do some in the arts component). If I don't then my next preference would probably be adv. science at sydney where I would hope to major in mathematics along with physiology...

Sounds good to me. I'd just get f using f = c/wavelength. Then E(per photon) = hf = energy/photon P/hf = (Energy/Second) x (Photon/energy) = Photons per second

You're safer using the ones they provide, they're the same ones anyway. For example, max range is found when y = 0. 0 = uyt - (g/2)t2 = Vsin@t - (g/2)t2 so tmax = 2Vsin@/g x = uxt = Vcos@t Therefore max range = V2sin(2@)/g = whatever Same deal as 3 unit eq'ns just safer and without...

'Cause the question says that the satellite is one earth radius from the 'surface' of the earth so I figured that it's two earth radii from the actual centre - hence 2r.

He's a tough man to beat. You could have much worse people infront of you though :p so be happy in that respect.

The one I know is: HHb+ + 4O2 <--> Hb(O2)4 + H+ where Hb represents haemoglobin Then you have the CO2 (aq) + H2O(l) <-> H2CO3 (aq) <-> H+(aq) + HCO-(aq) Breathing in oxygen increases acidity and releasing carbon dioxide decreases acidity (which you can see looking at those...

You don't actually need to calculate that GM/4(pi)2 stuff (it uses up a lot of time). What you're working with is the fact that r3/T2 has a constant value for objects orbiting the earth hence: r3/T2 (satellite) = r3/T2 (moon) (2r)3/T2 = (70r)3/302 T2 = (8x302)/703 = 0.02 days Hence...

Initially, end Y is the negative terminal... Why do the electrons move to end X in the first place? ---> because it is the positive terminal. This might change later but while under the effect of the magnetic field the induced 'current' flows as though Y were the negative terminal.

Take an example of the Earth and a satellite. You have to do work in order to move the satellite to a distance further away (against the force of gravity). In doing this the satellite gains potential energy. The satellite does work itself if it approaches the earth. In this case the satellite...

It's a poorly written question. Current flows from X to Y, i.e. were there a positively charged particle it would flow from X to Y. Electron flow is from Y to X - the would result in electrons building up at end X giving it a negative charge. End Y is the negative terminal End X is...

If they were able to observe events in the ship somehow (using some super telescope or something?) then technically yes, but because the earth also looks time dilated relative to the space ship then the people on the earth would appear to be in slow motion, as observed by the people on the space...