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# The Physics PHYA2 thread! 5th June 2013 Watch

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1. (Original post by StalkeR47)
Could you post a diagram with the question you need help with? Thanks.

wasn't sure how to draw the triangle
2. Does anyone have any predictions for the six mark questions?
3. (Original post by UnknownUsername)
Does anyone have any predictions for the six mark questions?
The two that come up quite a LOT are the diffraction ones for young's and stuff or the one about extension and young's modulus of a wire.
4. can anyone explain Q. 4. b) (i) from the jun 2012 paper???

it's on fibre optics and i really don't understand!

the fibre is like, bent at 30 degrees and it asks you to calculate the angle of incidence??

whuuuuttt?

thankyou!!
5. (Original post by BenChard)

wasn't sure how to draw the triangle

Mmm, it seems you've gotten yourself in a muddle there. You need the line of the weight, to be the hypotenuse. I've just drawn this up, this should help a bit.
6. (Original post by StalkeR47)
weight is given by, mgsinx.
Is that always?

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7. (Original post by BenChard)

wasn't sure how to draw the triangle
This is how you draw.
Attached Images

8. (Original post by Jimmy20002012)
Is that always?

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Yes always for the inclined. But, do not remember. Check my diagram. I have posted a min ago. up there.
9. Does anyone have a few steps that can help me when working a question says to show the path of the ray until it returns to air, the seem to always get me! Thanks!!
10. "http://filestore.aqa.org.uk/subjects/AQA-PHYA2-QP-JUN12.PDF"]HYA2-QP-JUN12.PDF[/URL]
11. (Original post by Raimonduo)
Mmm, it seems you've gotten yourself in a muddle there. You need the line of the weight, to be the hypotenuse. I've just drawn this up, this should help a bit.
Hey cool! How did you draw this clear? Is there a particular software?
12. (Original post by Emma1124)
Does anyone have a few steps that can help me when working a question says to show the path of the ray until it returns to air, the seem to always get me! Thanks!!
Do you have an example of such a question?
14. January 2013 paper anyone? My teacher lost their login.
15. it's only a one marker so it'll be quick to reply to!!

Question 6di from June 2010!

I'd truly appreciate it
17. (Original post by Raimonduo)
Mmm, it seems you've gotten yourself in a muddle there. You need the line of the weight, to be the hypotenuse. I've just drawn this up, this should help a bit.
that's really good thanks
18. (Original post by StalkeR47)
Hey cool! How did you draw this clear? Is there a particular software?
ms paint lol.

(Original post by frankieeeeeee)
What do you need help with?
19. (Original post by frankieeeeeee)
it's only a one marker so it'll be quick to reply to!!
What help do you need?
20. (Original post by Raimonduo)
ms paint lol.

What do you need help with?
Alright! How confident are you feeling for the physics exam?

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