*SUGGESTED* SOLUTIONS

[stockstamp]

Would anyone else agree that question 4 must be a mistake?

If the radius and mass are constant n a motion, design speed (ie when friction is effectively 0) can only occur at a single speed.

In part a) the question says 'The angle of the bank is such that there is no sideways frictional forces', and part b) asks you to calculate the speed 'with no sideways friction'. Hence they must be the same speed - Surely! It's impossible to have to difference speeds if all other variables are constant.

Also is it possible that the answer to question 10 of Sound is a? Although the two frequencies are quite different, the wavelength/aperture ratio is far below 1 for both, therefore neither would experience significant diffraction, and the edge of the pattern would still be 'approximately' 1.5m off the centre line. That's what I assumed anyway. Anyone have any thought? Or can someone explain why I am wrong?

[jyce]

Would anyone else agree that question 4 must be a mistake?

If the radius and mass are constant n a motion, design speed (ie when friction is effectively 0) can only occur at a single speed.

In part a) the question says 'The angle of the bank is such that there is no sideways frictional forces', and part b) asks you to calculate the speed 'with no sideways friction'. Hence they must be the same speed - Surely! It's impossible to have to difference speeds if all other variables are constant.

Also is it possible that the answer to question 10 of Sound is a? Although the two frequencies are quite different, the wavelength/aperture ratio is far below 1 for both, therefore neither would experience significant diffraction, and the edge of the pattern would still be 'approximately' 1.5m off the centre line. That's what I assumed anyway. Anyone have any thought? Or can someone explain why I am wrong?

Yes, I believe that change in speed was a mistake; nevertheless, the suggested answer is given for 3 m s^-1.

In regards to question 10 of sound, I've now had 2 people for A, 2 for B and 1 for D. Until I get more conclusive support for one answer, it'll remain as B.

[Orson]

Would anyone else agree that question 4 must be a mistake?

It would be nice if you were right...

Expected Raw Study Score for getting somewhere between 140 to 142 out of 150?

45 easy...

Routine power loss questions, I'm just happy for the 3 easy marks. think I got 16w

Yeap. Same. Did you get 0.2A for the current?

Are these answers ok?
7a) 3.7x10^4 s
7b) 1.1x10^8 m
14b) 9546 V
19a) 91.9 ev and 108.9 ev

Yay...I got something right!

[ashmitch]

if the tension forces pulled inwards, wouldn't the beam pull outwards to balance these forces though?
oh well, 2 marks gone, not bad, haha

Pretty sure between points M & N it is definitely Compression, I think outside the points M & N there would be more tension, so the beam as a whole is under both compression & tension, but it asked specifically between M & N so i'm pretty confident it's compression.

[dimitrigots]

energy level question in the atom, people saying 108.8 and 91.9, vcaa would surely accept 109 and 92 as answers wouldn't they? This isn't chem with sig figs

[GeniDoi]

Yes, I believe that change in speed was a mistake; nevertheless, the suggested answer is given for 3 m s^-1.

In regards to question 10 of sound, I've now had 2 people for A, 2 for B and 1 for D. Until I get more conclusive support for one answer, it'll remain as B.

Wow... is it actually possible we may have on our hands the first cancelled physics question (ie everyone gets a mark)?

Because surely they can't accept both using 2m/s and 3m/s as valid solutions.

[GeniDoi]

energy level question in the atom, people saying 108.8 and 91.9, vcaa would surely accept 109 and 92 as answers wouldn't they? This isn't chem with sig figs

Yeah, they would accept both those.

[bobisnotmyname]

Wow... is it actually possible we may have on our hands the first cancelled physics question (ie everyone gets a mark)?

Because surely they can't accept both using 2m/s and 3m/s as valid solutions.

I don't think they would cancel the question. Thinking about it now, I think it may have been done so deliberately just to really separate the state. Stupid, but I guess that's the way it is.

[GeniDoi]

I don't think they would cancel the question. Thinking about it now, I think it may have been done so deliberately just to really separate the state. Stupid, but I guess that's the way it is.

Being good at physics =/= being able to notice every nook and cranny of every page on an 80 page paper in 2 and a half hours for fucks sake. Bloody vcaa should leave that shit for Concentration Studies 3/4

[odeaa]

Being good at physics =/= being able to notice every nook and cranny of every page on an 80 page paper in 2 and a half hours for fucks sake. Bloody vcaa should leave that shit for Concentration Studies 3/4

Amen, how does it prove anything if we noticed a slight change or not. Should be about separating people based on knowledge, not detail analysis

[Ysera]

Guys do you know if these scores can get a 40 plus
GA1 78
GA2 82
GA3 134/150

[dimitrigots]

Poor wording of questions as well.
Apparent weightless question made no relation to the point where you have to talk bout that they actually do have weight.
Modulation didn't specify energy transformations, so ill be angry if they take marks off for not stating energy change.
And diagram question in light and matter was pointless, no specifications given.

[odeaa]

Poor wording of questions as well.
Apparent weightless question made no relation to the point where you have to talk bout that they actually do have weight.
Modulation didn't specify energy transformations, so ill be angry if they take marks off for not stating energy change.
And diagram question in light and matter was pointless, no specifications given.

Man I'm so salty fuck vcaa

[Ysera]

Man I'm so salty fuck vcaa

I interpreted the question wrong, i thought the question said if he is weightless. However i explained it properly and explained the difference between apparent weightlessness and weightlessness, however i wrote No at the start but then i said he did feel weightless.