*SUGGESTED* SOLUTIONS

[yeahm8]

ah i brain faded and wrote about reflection for the particle nature, im guessing that wont cut it...

[dave101]

I just finished marking the exam myself. I thought it wasn't the hardest exam, but I made so many stupid mistakes mainly because I'm that careless 
Anyway I calculated my percentage to be 85.3%. Btw im in year 11 doing physics 3/4. What study score do you reckon that would be?

[dankfrank420]

I just finished marking the exam myself. I thought it wasn't the hardest exam, but I made so many stupid mistakes mainly because I'm that careless 
Anyway I calculated my percentage to be 85.3%. Btw im in year 11 doing physics 3/4. What study score do you reckon that would be?

Just on 40 imo.

[jyce]

Just on 40 imo.

Agreed.

Keep in mind these are only *suggested* solutions.

[sharans]

What I got for sound

B
C
B
B
A
C
B
D
D
B
D.

Not too sure about question 11 though, some of my mates said it was B but others said it was D

[dave101]

Just on 40 imo.

I'd take 40 any day. This year's exam feels a bit more simpler than previous years and students might do better on this year's exam so the average could be pretty high. I'm not too sure. But yeah

[jyce]

What I got for sound

B
C
B
B
A
C
B
D
D
B
D.

Not too sure if question 11 though, some of my mates said it was B and other said it was d

I thought D myself, but wasn't sure so went with dankfrank420's answer. I'll put D on there as well.

[Davos]

Re: 17b

Shouldn't the answer be C?

More diffraction, and since the ratio of lamba/s must be greater then s must be a smaller number?

Also I got the same answer for the last question 7.3*10^7

JYCE, thank you very much for your services. One last thing, Isn't this correct?

[jyce]

JYCE, thank you very much for your services. One last thing, Isn't this correct?

I personally don't believe it's C. In a double-slit experiment, we don't really consider diffraction.
I'm going off the fact that the band separation is proportional to (wavelength x slit separation)/slit-screen separation.

ERR never-mind. I mucked up the relationship. You're correct!!

[sprout]

I wrote about how atoms only absorb discrete amounts of energy as proof for wave properties of electrons.. Would that be alright or nah?

[jyce]

I wrote about how atoms only absorb discrete amounts of energy as proof for wave properties of electrons.. Would that be alright or nah?

Assuming you explained it properly, that's fine.

[GeniDoi]

That bloody banked angle question is so nasty... why would they mention 2m/s and then later change it to a 3m/s??? WTF is the point of that... urgh

How many marks lost for the banked angle question if I used the 2m/s value?

[jyce]

That bloody banked angle question is so nasty... why would they mention 2m/s and then later change it to a 3m/s??? WTF is the point of that... urgh

How many marks lost for the banked angle question if I used the 2m/s value?

1. Although I suspect it's a mistake in which case they'll give you full marks. If it wasn't a mistake that's just plain cruel and unnecessary.

[ashmitch]

Pretty sure Structures & Materials Multiple Choice were;
AAC BBD BCD CD

I've had a few other pretty strong students agree with me but if some are still wrong I'm sorry.
Hope you all went well today & Thanks for posting these solutions.
One last thing, what mark do you think you'll need for an A+ on this paper? , last years was 128, do you think this year is around the same? I think i got somewhere between 133-137 based on these solutions & i'm praying that will get me in the 40's ahahaha

[stockstamp]

Does anyone know how thorough the assessors are with consequential? I said the gain was -45 because I read Vout as friggen 4.5 instead of 5 (stupid...)

Also for sound, couldn't the answer to question 10 be A? Because while their diffraction would be different, the ratio of wavelength/width of aperture is still below one, so each would experience very minimal diffraction.

Also missed the speed change on the banked curve goodbye 40