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# Edexcel P3 Physics Exam *Unofficial Mark Scheme* 24th June 2016

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I found that the written questions were better than the calculations, but it was a mixed bag to be honest. How about you?

What did you put for the charge of a alpha nucleus?
2. I got D for the charge - +3.2 x 10^-19?
3. (Original post by Ninestars)
I got D for the charge - +3.2 x 10^-19?
I put that too
4. I found it a beautiful paper!
5. What did everyone get for the new volume question? I got like 123m^3, but I'm awful at gas calculations so I'm unsure
6. (Original post by Ninestars)
What did everyone get for the new volume question? I got like 123m^3, but I'm awful at gas calculations so I'm unsure
Yeah i got 123 too.
7. What did everyone get for the intensity question near the end? Did the power have to be first be converted to watts by dividing by 1000?

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8. (Original post by dan9909)
What did everyone get for the intensity question near the end? Did the power have to be first be converted to watts by dividing by 1000?

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I can't remember, but i know i divided by 1000 as the answer was in W so had to convert kw into watts.
9. (Original post by dan9909)
What did everyone get for the intensity question near the end? Did the power have to be first be converted to watts by dividing by 1000?

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I got like 22,200 W/m^2
10. Ah I got similar. That's a relief

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11. (Original post by Ninestars)
I got like 22,200 W/m^2
I got 22,222 too for the voltage one.
12. There was so much maths i can't remember which answers i put
13. (Original post by XherdanXhaka)
I got 22,222 too for the voltage one.
The calculations are not hard, it's just that the numbers are so messed up and when i square rooted one of them, i got like 15,625 or something. It's always square rooting some big numbers.
14. (Original post by XherdanXhaka)
The calculations are not hard, it's just that the numbers are so messed up and when i square rooted one of them, i got like 15,625 or something. It's always square rooting some big numbers.
I think I got that too for the velocity question or something. At first, my calculator kept saying maths error because the numbers were too big to square root at the same time, so I had to square root the answer separately.
15. Did anyone get like 2.2222222 x 10^13 or something for an answer?
16. Lovely paper to finish my GCSE's on! :-)
17. (Original post by Liv123456789)
Did anyone get like 2.2222222 x 10^13 or something for an answer?
I got that!

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18. What did you get for that volume question? I got 120 something- can't remember exactly.

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19. what did people put for describing the graph?I put that volume and pressure are inversely proportionate so as the volume increases the pressure decreases. Also i attached my line of best fit to the y axis, is this right?
20. (Original post by TSR778899)
what did people put for describing the graph?I put that volume and pressure are inversely proportionate so as the volume increases the pressure decreases. Also i attached my line of best fit to the y axis, is this right?
I put exactly the same thing for that question

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