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3. Co-60 is a gamma emitter; the more common usages are leakage detection and the non-intrusive treatment. In industry, thickness detection as well for some metals.

Physics will be the hardest of all three subjects. You'll want to know at least something of maths/physics. Although, I can't recommend hsc texts because the first year course isn't the same. There's a lot more meat as opposed to the airy-fairy of hsc phys. you should be able to keep up...

As far as I know, yes. Though, I do not think it's that important to add the gamma. Truthfully, emission of photons happens most of the time after a nuclear decay. The energy of the photon makes the difference in whether it's in the X-ray or gamma range. willl edit above post.

It depends on the decay. - the emitted particles will carry off energy, in the form of KE. For alphas this amount is ~pretty constant, but for betas, the antineutrino also carries the energy. However, the total energy carried off by these two particles will be ~same. - If the nucleus comes...

I have a non-standard solution, I'll post it up in a sec. EDIT: Solution, in detail/step by step. Consider a circle of the above description, and extend AB to become the x-axis of the cartesian plane, with the center of the circle as the origin, O. (Therefore the circle is described by...

I'm not clear on what you're asking... H2CO3 exists in several forms in (and out of) solution. it goes like this: H2O + CO2(gas) <-> H2CO3 <-> H⁺ + HCO3^- <-> 2H⁺ + CO3^2- What you get when you place hydrogen carbonate in an acidic solution...

The answer is no. Remember that catalysts do not end up inside the product. The peroxide serves to take an electron from the ethene double bond, and does not take part in the other steps of the polymerisation. In the end you have chains, and what is left from the peroxide separately.

It's nice to think of them this way: For a particular year: - assume the 20 immigrants are not going to participate in the birth/death process; they've only just arrived. - So you incr. the resident population by 10%, multiply by 1.1 Hence, at the start of next year, there is: (population...

The pinch of salt just makes the stuff sweeter... so unless you want to stress about ionic balance or other biology issues, salt isn't required to make the reaction go.

Correction: cosx = lim <B>n</B> -> infinity of that, where n is the number of terms on RHS used to approximate cos x.

a) >= 0 within the square root. Implies x^2 <= 1. tells you domain. sqrt(1-x^2) using that domain, runs from 0 to 1. inverse sin that. b) sqrt limits you again. A tip here for finding inv trig is to take the trig of both sides. In this case we get tany between 0 and 1/2. c) all x...

Clearly all I got out of it was a greasy hamburger and some time off with friends. But you do need to fill out some key parts of the sheet, e.g. methods of preservation and desalination, i s'pose.

With few exceptions, if you turn the electric motors manually you'll get a current flowing. In fact, when you look at all the hsc pics of them you'll find that they look almost exactly identical.

http://www.phys.unsw.edu.au/~jw/FAQ.html#black This may help you much, and there's another from there. The point of emphasis is that an electron only exists in multiples of some fundamental frequency (think deBroglie), and when light is emitted from said electron it therefore can only have...

Hmmm.... it would be shite. I'll throw up a random experiment, but I haven't done med physics, only optical fibre tech. you'll need to edit it as see fit, this one is prob. not going to give much marks as is. equipment: A dark room. bright light bulb. optical fibre. large book. paper...

Were you asking about the song? THE ROSE - Bette Midler Some say love, it is a river that drowns the tender reed. Some say love, it is a razor that leaves your soul to bleed. Some say love, it is a hunger, an endless aching need. I say love, it is a flower, and you it's only seed...

These assignments last year were indeed very easy, so I thought they might also give marks to your logic if ithe question was worth more. You should say that you realise taking one letter away is equivalent to placing it at the back, or whatever steps you take (in succint terms) to derive the...

Grabbed conquering chem exam markers' notes on the question. It's not in the syllabus because I didn't find it on the current boardofstudies version. You got that idiot of a question from my chem '02 paper! :cross: Question 32 – Forensic Chemistry (25 marks) (CCHSC page 458-9) (a)...

cleopatra, if this was the songs thread I'd truly dedicate to you 'The Rose'.

...think sand. Think germanium. Sand is too cheap.