Physics 3/4 Exam Discussion

[zsteve]

i think because it said change and not increase/decrease it is just the magnitude of the change, especially since energy is a scalar

otherwise rip 50

You could interpret it that way, although I'd say the negative is preferred (possibly strongly preferred, I'll leave VCAA to interpret) because change does have direction and hence needs to be indicated with sign.

[bobisnotmyname]

Do you guys think that VCAA sometimes mess up questions, and play them off like they intended them to be that way. I kind of get that impression from some of the previous exams and examiners reports

[Tyleralp1]

That angle of bank question, as soemone pointed out earlier..

Do you think that was an intentional thing or a typo given how close the numbers are? Because I'm wondering why would they even stipulate a speed in the pre reading, seems quite stiff to me. I sadly used two, and I know one might say "read the question better", which is true, though could this have both answers used?

Others gf 1-2 marks

[yeahm8]

what did everyone have for the flux/emf graphs?

[zsteve]

abs(sin(x))

[dankfrank420]

abs(sin(x))

Wasn't that for the DC graph?

[zsteve]

Wasn't that for the DC graph?

It was for the generator.
Ah yes, flux/emf was like:
flux: ______/-------\_______
emf ______        ______|-------|______
                  |____|

[yeahm8]

and what did people have for the threshold freq of the metal with 50% larger work function

[zsteve]

and what did people have for the threshold freq of the metal with 50% larger work function

7.5e14, original value * 1.5

[yeahm8]

7.5e14, original value * 1.5

yep nice,seemed to easy

[jyce]

I'm doing the exam for my students, and I've just finished motion. Did you guys want me to put the answers up as I go, or are you all good?

[cooldude123]

Answers would be appreciated jyce!

[dimitrigots]

What do you guys reckon we're looking at for thr A+ cut off? about 85 like past years? or maybe a but higher?

[bobisnotmyname]

What do you guys reckon we're looking at for thr A+ cut off? about 85 like past years? or maybe a but higher?

I think anywhere from 80-95%, although more likely to be 85-90%. I guess not much we can do now but wait and see

[dankfrank420]

What do you guys reckon we're looking at for thr A+ cut off? about 85 like past years? or maybe a but higher?

Yeah, exam was pretty much the same as last years so I'd say about the same.