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thanks could you answer one more when a hsc question says 'refer to your set text', is it one poem or what?

thanks, how many do we need

Hi, Does our self selected material have to be related to sylvia and ted? Our teacher said so but I dont think so

I'd say 1,1,2-trichloro-1,2,2-trifluroethane ^^ from CM_tutors post

We were told our related material has to be related to sylvia plath (eg ted huges poems/her journals etc), is this true?

At room temperature, there are atomic vibrations within the lattice which cause great amounts of collisions with the electron current, thus providing more resistance At superconductors below the critical temp, there are no atomic vibrations thus no resistance

I think you're looking for the english board

Say you are using an incadescent lightbulb to test the photoelectric effect with a data logger/photocell. As the light bulb heats up, would it emit more photons? why?

can you assess the limit x->0 of cosx/x or of 1-cosx/x ?

sorry, looks like i oversimplified the question i have a feeling of the method but I'd like to see a more confident answer from someone

You should get a set of values of AAS readings for known ppm concentrations, plot them on a graph accurately. You should then be given a AAS value for your sample, find that value on the graph and you can see the ppm of it aswell

if x is real, it meens Im(x)=0 that meens x + i = Re(x) + i Solve (x+i)^4 for x, and then subtract i from the answers?

CM tutor, "The lowest overall set of locants applies here," what do you meen by that

Ahh fuck I used cos double angle formulas aghhh!

(*THIS IS ALL WRONG*) From Double angle formulas, sin2x = 2cos²x-1 so 2cos²x-1=cosx 2cos²x-cosx-1=0 let y=cos x 2y²-y-1=0 (y-2)(y+1)=0 y=2,-1 cosx=2 cosx=-1 solve from there

Ah sweet, easy, but wouldnt you times it by 10?

Yeah you were , for 1ppm standard solution concentration the AAS was 0.105, for 2ppm it was 0.195, for 3ppm it was 0.285, for 4ppm it was 0.375 so do you compare those values to yours?

Can anyone tell me how this is done?? For instance if you have 5mls of oil diluted to 50mls with a suitable solvent and you're testing for silver with AAS and get a reading of 0.230, how do you calculate the concentration of silver in ppm btw this is from the NEAP CM&M paper

So whats the go with the applet

Yess, so two lights (blue and red) of the same intensity would produce the same current assuming the metal will liberate electrons to both these colours? http://lectureonline.cl.msu.edu/~mmp/kap28/PhotoEffect/photo.htm Why does this applet increase current with frequency then :confused: its...