[Marcus4004]

Writing answers as we speak, should be done in 15mins.

[JohnS17]

I thought the paper was quite long, normally im able to do a paper in plenty of time but i felt in the exam it took longer than it should which meant i didn't get a chance to check my answers properly. Hoping for an A as i got a B in my Prelim

[stevies94]

Thought it was a fair paper, rather happy with how i did. Is anyone doing a full typed up answer sheet ?

[Marcus4004]

Advanced Higher Physics 2012 Answers
https://docs.google.com/document/d/1...Xvw/edit?pli=1
The explanation questions are still to be done and some of 5, as I forgot the write the answers on my paper :/

Any mistakes please speak up!

[Evan7788]

(Original post by Marcus4004)
Advanced Higher Physics 2012 Answers
https://docs.google.com/document/d/1...Dhk/edit?pli=1
The explanation questions are still to be done and some of 5, as I forgot the write the answers on my paper :/

Any mistakes please speak up!

Using those i got around 75% which is huge for me! I'd be happy with a B/C !!!

Although you missed some questions out on Q9.

[stevies94]

(Original post by Marcus4004)
Advanced Higher Physics 2012 Answers
https://docs.google.com/document/d/1...Dhk/edit?pli=1
The explanation questions are still to be done and some of 5, as I forgot the write the answers on my paper :/

Any mistakes please speak up!

Not out your theory in the last question mate, il post mines when im home.

[Marcus4004]

(Original post by Evan7788)
Using those i got around 75% which is huge for me! I'd be happy with a B/C !!!

Although you missed some questions out on Q9.

Well done! Thanks for that, have changed. (anything else)

[Marcus4004]

(Original post by stevies94)
Not out your theory in the last question mate, il post mines when im home.

Im sorry? And please do post your answers as well!

[stevies94]

(Original post by Marcus4004)
Im sorry? And please do post your answers as well!

Not sure about ***** haha will do

[Aerofantastic94]

2ci) Doesn't the friction allow for the skater to maintain a curved path?
2cii) And when velocity increases then with eqn, F=mv^2/r, you can see that when the skater's force is dependent on the veolcity and when she exceeds the friction force force she will go off balanced.

[Marcus4004]

(Original post by Aerofantastic94)
2ci) Doesn't the friction allow for the skater to maintain a curved path?
2cii) And when velocity increases then with eqn, F=mv^2/r, you can see that when the skater's force is dependent on the veolcity and when she exceeds the friction force force she will go off balanced.

ci) Yes F is the friction (kinda)....
ii) Yes thats what i mean, need to expand my answers...(I rushed them out)

[laughylolly]

For 9. A) vi) the Phase difference one. I got 11 radians. I did (2pi x 0.44 / 0.25) that could easily be wrong though so.

[Marcus4004]

(Original post by laughylolly)
For 9. A) vi) the Phase difference one. I got 11 radians. I did (2pi x 0.44 / 0.25) that could easily be wrong though so.

Its from P to Q, hence the path difference (x) = 0.44-0.25. Hence equation is (2pi x (0.44-0.25) / 0.25). I thinks

[Evan7788]

(Original post by Marcus4004)
Its from P to Q, hence the path difference (x) = 0.44-0.25. Hence equation is (2pi x (0.44-0.25) / 0.25). I thinks

I got 4.76 radians

[PaulB]

For the equations of the wave in question 9b and c, would they not be y=-0.58sin2pi(5t-4x) and y=-0.29sin2pi(5t+4x) respectively?

[Marcus4004]

(Original post by PaulB)
For the equations of the wave in question 9b and c, would they not be y=-0.58sin2pi(5t-4x) and y=-0.29sin2pi(5t+4x) respectively?

That's what I put on my exam, but have been informed by other pupils I was wrong. I will consult my physics teacher tomz...

[soup]

Surely for 9a)i) it's 3pi/2 ? You could either look at it as 3/4 of a full cycle (which is 2pi) or set X = wavelength/2 + wavelength/4 = 0.1875, this is more accurate than 0.44-0.25.

[Marcus4004]

(Original post by soup)
Surely for 9a)i) it's 3pi/2 ? You could either look at it as 3/4 of a full cycle (which is 2pi) or set X = wavelength/2 + wavelength/4 = 0.1875, this is more accurate than 0.44-0.25.

But x is not measured in radians, look at the units on the x-axis. (or am i missing something). Since the answers are very similar, I am hoping we are both right.

[AeroLB]

It was an OK paper, i found it a bit more difficult than the past papers, but I'm confident i'll get a high A. What I like about physics though is that they award half-marks... makes all the difference when theres a small error!

[PaulB]

(Original post by Marcus4004)
That's what I put on my exam, but have been informed by other pupils I was wrong. I will consult my physics teacher tomz...

What reasons did they give, can't see why that would be wrong. Also did 9c) say the wave was halved as well as reflected since I must have missed that bit, I just wrote the equation for the reflected wave.