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3U or 4U?

I should've left 3U when the fire alarm went off instead of struggling through the rest of it

Did other people find this years paper for both 3 and 4U a fair bit harder than the 2012-14 BOS papers? IMO they have got harder each year

same I couldn't focus and worked to slow. I will get like 20 something percent

Nah I'm dumb. The 3U one. I didn't attempt the 4U one.

How did you fellas get the induction one?

what time do we arrive?

What time will the student numbers be sent out?

I got one in year 7 for throwing a drink bottle on a roof

The named chemist doesn't have to be a real chemist. Its more just a chemist in a particular branch of chemistry what they do and a principle that they use

except heaps of energy is required for cooling as well

from jacaranda

there are 2 types of maglev train One uses superconductors for levitation which uses the Meissner Effect The other which simply uses two very strong electromagnets

its only one mark so I think it is just asking to state the significance of Planck's constant

I don't see it

although i'm curious to why the 3rd line is there surely -log(x^2+1)+log(x-i)+log(x+i) =-log(x^2+1)+log(x^2+1) =0

i.e. beyond the scope of the extension 2 course

I reckon the formula should still apply but it is beyond the scope of the syllabus to apply it Both these textbooks define the photoelectric effect for metals only so I would be reluctant to say that solar cells operate using the photelectric effect

Along with the video posted above this is very good explanation http://community.boredofstudies.org/18/physics/291080/how-does-solar-cell-work.html#post6094413

Someone correct me if i'm wrong this is what I learnt It doesn't need sunlight to be shone on it for the p-n junction form. Simply connecting the P and N semiconductor will cause a p-n junction and hence a potential difference to occur The PV cell isn't the photoelectric effect since the...