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# OCR PHYSICS B G491~ 19th May 2015 AM ~ AS Physics watch

1. (Original post by jpetersgill)
More like 6. Something ..?

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Yeah, got 6.6
2. (Original post by jpetersgill)
More like 6. Something ..?

Posted from TSR Mobile
6.04 or around that
3. Has anyone been able to get a spare copy of the paper? If so could you post it online? I know that someone posted the g491 for 2014 May so if you could it would be much appreciated.
4. (Original post by jamesjmillar)
6.04 or around that
6.4*
5. Can someone tell me how they are getting around 6
6. (Original post by CancerousProblem)
I got 0.67

edit; i meant 6.7 mistype
Isn't it 150?

3000/20=150
So presumably it has 150x more resistance which makes sense

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7. Yeah I got the ratio as 150:1 so p3000 is 150 times larger
8. what did you get for the question about steel beams?
9. (Original post by Mutleybm1996)
Isn't it 150?

3000/20=150
So presumably it has 150x more resistance which makes sense

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No, unfortunately those are the temperatures, not the resistivities.
10. (Original post by Mutleybm1996)
Isn't it 150?

3000/20=150
So presumably it has 150x more resistance which makes sense

Posted from TSR Mobile
No, 20 degrees was the minimum point on the graph which you used for resistance in the first part. 3000 degrees is the maximum because the p.d. was 6V, so working out this resistivity gave a ratio of ~6.something
11. (Original post by xXn00bkiller69Xx)
what did you get for the question about steel beams?

No, jet fuel unfortunately can't melt them.
12. (Original post by Wolfea)
No, jet fuel unfortunately can't melt them.
phew good I got the same, what about the one asking if you believed that 9/11 was an inside job?
13. what question about steel rods?! :O
14. (Original post by xXn00bkiller69Xx)
phew good I got the same, what about the one asking if you believed that 9/11 was an inside job?
wait sorry guys, I thought this thread was OCR Psychology
15. does anyone know how the graph of the last question about scanning tunnelling microscoper looked like
16. (Original post by lauren_2)
what question about steel rods?! :O
You had to calculate whether or not the jet fuel would be able to melt the steel beams. It was on the back.
17. (Original post by lauren_2)
what question about steel rods?! :O
it was on the back page
18. There was no question on jet fuel
19. (Original post by Zain.chishty)
does anyone know how the graph of the last question about scanning tunnelling microscoper looked like
Mine just had three peaks, for the 3 atoms...up to 260pA I believe
20. (Original post by jack0997)
0.018m?
Yes...thank goodness. Would you get a mark for stating your assumption?

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