Bozo's queries

[Lasercookie]

and it can only go from ground state up yeah?
i.e. cant go from n=2 to n = 3?

edit: removed incorrect stuff, refer to xZero's post

[xZero]

umm i dont think it can jump from n=2 to n=3, it must go up from ground state but when it drops down it can go from n=3 to n=2 etc.

[Lasercookie]

umm i dont think it can jump from n=2 to n=3, it must go up from ground state but when it drops down it can go from n=3 to n=2 etc.

:|

I better get back to studying in that case.

Sorry for telling you the wrong thing Harvey.

edit: fixed annoying typo

[Bozo]

It can jump from n=2 to n=3, but in VCE physics, we assume it does not purely because its a 1 in 1000 chance. That's what the chief assessor at TSFX physics said.

[xZero]

according to my lecturer, it cant because there's no atom in the n=2 state, or simply atoms in n=2 state transitions back to n=1 too fast to absorb enough energy to jump up a state :S im all confused

[Lasercookie]

It can jump from n=2 to n=3, but in VCE physics, we assume it does not purely because its a 1 in 1000 chance. That's what the chief assessor at TSFX physics said.

according to my lecturer, it cant because there's no atom in the n=2 state, or simply atoms in n=2 state transitions back to n=1 too fast to absorb enough energy to jump up a state :S im all confused

I don't think those two statements contradict too much. If it transitions too fast to absorb enough energy to jump up the state, there is still a small tiny chance that it might actually absorb enough energy? I'm not sure if 1 in 1000 is the actual probability or not.

Also, I didn't realise that Bruce Walsh does stuff for TSFX :| Or did they get a new chief assessor this year?

[Bozo]

Geoff Davies. He was the chief assessor this year. I can't remember though cause he said it was for one of the units only. It may have been last unit. So he's probably the chief assistant now.

[Bozo]

Who here has done Lisachem 2011. I don't get sound q2 and q3. Can anyone clarify?

[paulsterio]

Also, I didn't realise that Bruce Walsh does stuff for TSFX :| Or did they get a new chief assessor this year?

Yeah, I thought Bruce was the Chief Assessor as well? :S

[cranberry]

Who here has done Lisachem 2011. I don't get sound q2 and q3. Can anyone clarify?

attach it up and ill be glad to have a ping ....im redoing phys exams cause i got no new ones

[HarveyD]

just wondering:
for this question, in the table, we would give the peak voltage yeah?

[Lasercookie]

just wondering:
for this question, in the table, we would give the peak voltage yeah?

Yeah, X and Y are located at the locations of the peak voltages.

[HarveyD]

another quick question
with a question like this
where it asks for the force direction acting on side X-Y

I know its clear that its into the page when you use the right rule etc
but if you said the force was acting "down", would that be wrong?
because thats how it works in real life? since they tell you its a motor....

[iroflmfao]

You could always give them the pages you want to print from each pdf.

Printing at school = free.
Half pages = bonuses prints.

[Lasercookie]

another quick question
with a question like this
where it asks for the force direction acting on side X-Y

I know its clear that its into the page when you use the right rule etc
but if you said the force was acting "down", would that be wrong?
because thats how it works in real life? since they tell you its a motor....

I think down might refer to when  - how do I explain this? uhh, so fingers pointing into the page, thumb pointing left and your palm faces 'down' (in other words, along X to Y). I think that direction would be considered down in this case.

If it was one of those drawings where it's not flat, but it's like a perspective drawing (I hope you know which ones I'm talking about, e.g. like the usual VCAA ones) - I think then it's alright to use the word 'downwards'. To be safe, I use 'vertically downwards' - I saw it used somewhere (assessor reports possibly, don't quote me on that).

edit: Don't forgot about the direction key/little compass thing if they give you one. Always go by the wording given, if provided.