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Yeah I wrote for the signal to travel the optic nerve, action potential must be generatated in neurones by reaching threshold, so that an impulse is fired. Personally found that to be the best communication section to date. Was expecting some easy ass 7 marker about technologies but they mixed...

Yeah pretty much. I thought it was funny that they reduced projectile motion to a multiple choice question. It seems like a really popular thing to do since a lot of 2012 trials have a projectile motion question as a m/c.

Make sure your diagram for any question in 3D trig is big, clear and correct. It seriously helps to take a minute just to draw it properly. Don't forget the tools you have at your disposal to find missing sides and angles: sine rule, cosine rule, trig ratios, simultaneous equations, Pythagoras...

If you want full marks in 3 Unit, you have to be able to complete any binomial and ACPW question. I'm not talking about the wimpy linear motion and finding the greatest term stuff, I'm talking about the relationships between coefficients and projectile motion. Complete and question you can get...

You were supposed to take the 6 out and leave a 0.5 inside the bracket. Within the bracket, there was a (k+1)(k). That multiplied by the 0.5 is always a whole number since for k>1 or k=1 (k+1)(k) is always even. You could have just stated that or could have used induction again to prove that it...