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Listen to slow music if you really have to otherwise its better to not listen to music and study. Keep away from noisy music with high BPM like American Pop and Korean Pop.

Is this reduction equation correct for dry cell? 2Mn4+ + 2O2- + 2H+ + 2e¯ 2Mn3+ + 3O2- + H2O And does anyone know an easy way to memorise the chemistry of dry cell and silver oxide button cell?

That is just sad.

Okay, I'm going to use the same scenario where Person A has the 92% assessment mark but received 80% HSC mark and person B gets 84% assessment mark but 94% HSC mark. Will person B be given the 80% HSC mark of Person A or will he retain his 94% HSC mark so that both Person A and Person B receive...

What kind of extra curricular activities are they looking for?

You should either get a tutor or self-learn. If you have the Cambridge 3u Year 12, you can teach yourself Perms and Combs easily. You can skip the first few exercises as they are pointless in my opinion and just start straight off with Perms and combs. And skip the binomial probability if u...

Strange, we can see this really old post but we still cant see other old posts...

agreed, ahmed shah idil's notes are extremely good, you might have to alter it a bit if you are doing different batteries, radioisotopes for medice/industry.

Yeah, I've see trials with questions asking you about a specific cell and it was the lead acid one too. I only memorise dry cell and silver button. The syllabus says you memorise either dry cell OR lead acid and compare to one of the others. I doubt the actual HSC paper will ask for a specific...

Thanks jay and hscishard! Cleared things up for me a lot!

Can you tell me what trig identity u used to get 1+a^2 to become a?

How come you are allowed to split the modulus if its addition? I thought only when it is |Z1Z2| then you can split to |Z1||Z2| Edit:NVM LOL, I got this question now. Just need help on the first one!

I'll add in another one... Show that ||z1|-|z2|| < or = |z1+z2| State the condition for equality to hold.

On an Argand diagram the points P and Q represent the numbers Z1 and Z2 respectively. OPQ is an equilateral triangle. Show that Z1^2 + Z2^2 = Z1Z2. This is what I've done so far: Z2 = Z1cis60 since it is an equilateral triangle then I sub it in Z1^2 + Z2^2 I then get: Z1^2 + (Z1cis60)^2...