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This is what I think too. Lets say there are three monks all with blue eyes. Each sees that the other two have blue eyes and expects them to both kill themselves on the second day. When they don't, he realises that he must have blue eyes and kills himself. If though they do kill themselves on...

This is a big coincidence but I just heard this exact riddle yesterday- albeit with less pirates. I won't spoil the answer though -> its interesting.

You add concentrated acid to remove any carbonate present in the fertiliser-> note that barium carbonate would also precipitate out and stuff things up. I'm not that sure about the water but I think its to coagulate the particles so they don't pass through the pores of the filter paper-...

Wow that would suck- mine is similar (but not as deadly-no double days): Mon- English paper 1 Tues- English paper 2 Wed- Economics Thurs- 4U maths Fri- Chemistry Mon- 3U maths Tues- Physics

The year 11 and 12 books don't overlap- they cover different content so you should buy both.

I've got no idea sorry- someone else should have an idea

In standard or advanced? In advanced, I think something like 77/105- standard is probs a lot higher.

Not sure- maybe given that they mark chem quite harshly. Why though would you?

Yes ()2 means two lots of whats in the brackets but you wouldn't write it like this. The correct thing is just BaCl2 (also note capitals). You use the brackets when you have more than one of something that has more than one element- for example Barium Nitrate would be Ba(NO3)2

Yeah that makes sense because a lot of soft copies sometimes cut out like some intro pages or whatever. Your answer for that question was correct though :)

Wrong question I think but I could be wrong.

I just got my Cambridge book and checked the question- I remember this one- a nice but hard question. Umm... I don't have time to latex a solution but I'll give you some hints which should help: - What you should do is draw a diagram and work out the acceleration/speed/displacement for both the...

lol- I reckon its just a typo. Solve the question assuming it had indicated five roots (i.e. add e as a root as well)

Can you scan the question? I don't have the book.

Re: HSC 2012 Marathon :) You can prove this identity with entirely 3U methods. I remember an extension question in Cambridge went through it (it used the upper and lower bound rectangles)- I'll try and find the question.

English- Wrote 2 belonging creatives + a belonging essay. Fixed up my BR/Hamlet essays and started writing a Justice Game one Maths- About 4 4U papers and no 3U papers Chem- Went over the whole course Phys- Same as above but in way less detail Eco- Went over the course and read some essays

Are you assuming that the second ionisation has a degree of ionisation of 50% or the whole thing?

Maths I'd say. 3/4U english are out of 50 not 100.

Umm, about 5 for 4U and 3 for 3U. None for the rest yet- just going over theory currently.

Yes this definitely.