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Ahh okay thanks. One other thing. Different textbooks have different electrolyte pastes. They all have ammonium chloride, but different textbooks have varying compounds in the electrolyte. (e.g. zinc chloride, manganese dioxide, carbon powder). So what is the actual composition of the...

Hey everyone. I'm having trouble with the zinc-carbon dry cell. Every textbook (conquering, contexts, jacaranda) and other sources have different cathode reactions. Which cathode reaction is the right one? :S

what i meant was... in the third quadrant its pi + theta, and in the fourth 2pi - theta.

How did you know to do 2pi - 2pi/3 in the first revolution.... Because cosx = -1/2 should only be in the 2nd and 3rd quadrant shouldn't it?

Can someone explain how to solve the general solution for cos(x) = -1/2 I don't know how to derive it without using the formula.

dunno, but im not your dad.

2bii) Integrate: 3 / (x -6)^2

Alright, hope they're not slack and give me 0. Thannnkss guys :(

Am I screwed?

You forgot +C for 2bii LOL :D

3biii) x^2 + y^2 = 4 Isn't this circle's centre (1,3) therefore: (x - 1)^2 + (y - 3)^2 = 2^2?

Re: Would this be enough for a band 5? I liked this years exam. Every year the hard questions seem to be crammed into Q9&10, where I'd have little to no hope of answersing, whereas this year the difficulty was spread out between the questions, and made this paper unique. The fact most...

Iwould like to buy the solutions but i need to to know how to pay you or is it possible to come and get it off you if you leave close byand probably pay cash.