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I don't think I'm surprised by your news. :D My friend's aunt got UAI 100 and she did ESL as well. Basically, ESLers need to think of how to get UAI 100, not to get despaired any more.

Chem!

Well, I think it'd be the oxygen free radical having 2 unpaired electrons that make it extremely unstable. Simply saying, its outer shell is not completed. According to the rule of arranging orbitals and electron pairs, we tend to have the max number of free e-(s). Plus, I tend to think it's...

Are you asking about 'neutralization'?

Ozone is, yes, more soluble in water than oxygen. The problem with O free radical is that its existence is too short to actually carry out any tests for its properties. Just the same as its "unavailable" MP and BP

You just simply need to calculate the concentration of Oxygen in that sample. Convert it into ppm. Now, go and do the calculation! :)

I'm wondering about the 1st one as well. Last one: yes.

I choose wood. It's easier to relate to environmental consequences. You can choose Aluminium as well. Any metals should work. Hell, you have to write an essay?

Organisms. E.Coli (Escherichia Coli). This type of organism is present in ALL animals' intestinal tracts and hence faeces (yuk!). By detecting its presence, you can assure the water is contaminated by sewage. This increases the pH of water. OH- + H3O+ <--> 2 H2O (l)

It's rather late now so I can only quickly check these. 1st: correct. 2 sin105 cos105 = sin210 = sin(-30) = -1/2. remember 2sinAcosA = sin 2A. 2nd: line 3. there's a prob there. You made a mistake when breaking the bracket. Plus your work is weird. You jump in the steps you next to show...

Skeeter: I'm so sorry but this fact really 'sucks the ball' (just read above, try applying). What time is this that we still have to handle this sort of cliched parents' pressure? Are they studying for you or you are studying for them? The whole thing is about you. Well, maybe the fact is...

Well, the peppered moth is a classic example. Modern, in this case, means current and lately found. The P Moth is rather popular and at times not perfectly correct anymore.

Both. We have to leave the water sample in the dark at 20C for 5 days.

Re: Stat Ew. Sorry, I can't help this after the comments above. Do you think the test was reasonably long? I've done the practice questions from the free booklet and I find the maths-based qs are quite normal but the paragraph ones are bloody long. It should be OK if I have enough time to...

EVANESCENCE's album 'Fallen'!!! And yes, anything with piano is suitable. Check out Pink Floyd as well!

What? I absolutely love it! Yes you have to write it 'backwards'. Let's say you want to prove AB=AC <-- two equal triangles <-- SAS <-- 1. two similar triangles 2. two sides of a square. etc. This is just an example of how to make up a "flow chart". Hey, circle geometry is tricky but...

Um, sounds like they just apply 'real life' words into your test to make it an applied maths test? I knew that JR one year put 'calculate your UAI' question into the trial paper. That's pretty cool. Don't stress out. You'll be able to identify basic components to apply your maths into anyway.

U? So... you're planning for a gap year? I love that idea.

I'm not sure about your given samples but in common experiments at school level, we are provided with aqueous-soluble white solid which you can dissolve in not-neccessary-warm water.

Basically it's used to measure the []s of about 60 elements, mostly metals. Since it can give accurate measurements up to 3 or 4 sig fig plus the very tiny amount to ppm, AAS is particularly handy. I think it's pretty much a useful device in monitoring and controlling pollutions in these aspects.