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# OCR AS Physics A H156 Depth in Physics Thursday 9th June 2016 Unofficial mark scheme Watch

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1. (Original post by mahmzo)
Do you think ill get full marks, on the velocity projectile question. I got the correct answer however my working out was everywhere, like I had no room so had to do it in a cramped space :/ I am scared they will mark me wrong
2. (Original post by mahmzo)
He got it wrong. I got 6.6 where you had to use work out on the chart
That's right, the question had you calculate the square of L in 10E-3 m2. The value of L was 0.081m, which squares to 6.56E-3, rounded to 6.6E-3, so in the table you should write 6.6.
3. (Original post by lanteacher)
That's right, the question had you calculate the square of L in 10E-3 m2. The value of L was 0.081m, which squares to 6.56E-3, rounded to 6.6E-3, so in the table you should write 6.6.
what do you think the boundaries will be?
4. (Original post by Parhomus)
For question 5e how did you get the answer x 10^-4 ? With your working it gave an answer of 0.1121 ohm metres.
Typo. I'll change it.
5. (Original post by mahmzo)
He got it wrong. I got 6.6 where you had to use work out on the chart
Typo -- edited.
Thanks
6. (Original post by Parhomus)
For part 7a do you think you were supposed to link the one to one ratio with the increase in intensity; when it was above threshold frequency, that allowed more photoelectrons to be emitted per second. Also could you have shown why the observations proved why it wasn't only wave-like in nature such as saying the fact that increasing the intensity for em radiation below the threshold frequency would speed up the process assuming the wavelike nature assumes a continuous flow of energy; and since it didn't happen it could only be explained by the particle nature of em radiation?
There are lots of things you can write here that will score the marks
7. (Original post by teachercol)
There are lots of things you can write here that will score the marks
for the breaking stress one i wrote about finding strain at breaking point of a wire of known youngs mod and multiplying YM and strain? is that okay
8. (Original post by ronnydandam)
for the breaking stress one i wrote about finding strain at breaking point of a wire of known youngs mod and multiplying YM and strain? is that okay
Seems like an over complicated way of doing it to me. Have to wait for mark scheme.
9. (Original post by teachercol)
Seems like an over complicated way of doing it to me. Have to wait for mark scheme.
fair enough, hope I don't score 0 in that....
10. do you have the unofficial mark scheme for ocr b physics?
11. Sorry - don't teach/examine that syllabus and don't have copies of the paper.
12. does anyone have an unofficial mark scheme for the other physic paper with the multiple choice questions or at least some answers so i can see where i went wrong?
13. Video on the hardest question in that paper?

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