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# AQA Physics PHYA5 - Thursday 18th June 2015 [Exam Discussion Thread] watch

1. Did it ask you for root mean square or just mean square? i got 4700 or something, but I think it just said mean square
2. (Original post by DisguisedToast)
What did you guys get for the age of the universe in seconds?

Also if anyone remembers the figures from the age of universe question that would be awesome
can't remember the exact values but I got a value close to 5x10^17 seconds for age.
3. Have we come to a conclusion of how large the diameter was? I got 3m? I saw some people wrote 15 earlier which is just massive
4. (Original post by Jamesbe1993)
I'm sure it was two marks. One for stating the inverse square law and one for stating how it would apply to the situation.
ah, some think it was one ,some think it was 2..
oh well haha.. its small marks

now the 6 markers..i seriously messed them up
5. (Original post by Jamesbe1993)
can't remember the exact values but I got a value close to 5x10^17 seconds for age.
Yup got the same.
6. did anyone get 250 muons for turning point question? and what did everyone get for the voltage at which electrons are accelerated?
7. (Original post by ubisoft)
Have you done 2014 5c? Would you say this was harder or easier? Completely f'd it up. I forgot about the optional unit cause we had to self teach it, only read the book one day before didn't know f all
ahh that sucks mate sorry to hear that. I think question 3 was pretty difficult, best of luck
8. (Original post by sykik)
did anyone get 250 muons for turning point question? and what did everyone get for the voltage at which electrons are accelerated?
I got 500 muons but 250 is correct. (i missed the fact the dam half life is half the life of a muon)
Now for the potential i got 24v.. which i think is correct.
9. (Original post by lad123)
160000 is wrong on there for a start
And the magnitude!!! I mean minus 82!!! Have a word!!! 😭😭
10. (Original post by TheGreyPhysicist)
I got 500 muons but 250 is correct. (i missed the fact the dam half life is half the life of a muon)
Now for the potential i got 24v.. which i think is correct.
Get in!!... How did you find the paper overall? Can you recall what the values for specific heat capacity question were?
11. Anyone got a copy of paper please?
12. For the SHC definition did you have to use the data given? 130Jkg^-1K^-1?

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13. (Original post by sophiebeth100)
Anyone who did Medical Physics, quote me, how did you find the paper?
a nice paper, mostly because the 6 marker was the exact repeat of the 6 marker in recent papers (don't remember which one though)

did you get 0.19m for the corrected near point though? i always mess those calculations up lol
14. (Original post by CD223)
For the SHC definition did you have to use the data given? 130Jkg^-1K^-1?

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I think so because they specifically asked about 130Jkg^-1K^-1
15. (Original post by aprocrastinator)
a nice paper, mostly because the 6 marker was the exact repeat of the 6 marker in recent papers (don't remember which one though)

did you get 0.19m for the corrected near point though? i always mess those calculations up lol
I got 0.19m too. Nice to hear somebody else did! I hate lens equations
16. How many marks was the travelling distance of alpha/beta question, the calculating of magnitude question and the energy question please? Does anyone have a copy of the paper
17. (Original post by you-only-live-once)
For anyone doing medical, on the ears question, which line is DB and which is DBA?
the flat line was dB and the curved line was dbA
18. (Original post by CD223)
For the SHC definition did you have to use the data given? 130Jkg^-1K^-1?

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I would imagine so yeah lol
19. (Original post by sykik)
I think so because they specifically asked about 130Jkg^-1K^-1
I did. I was just asking as my friends said I was wrong to use their data.

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20. (Original post by sophiebeth100)
I got 0.19m too. Nice to hear somebody else did! I hate lens equations
awesome! I think the other two people at my school doing medical physics (out of 40 people. lol) got the same so probs right! Me too, it took me forever to get my head around it, i have no idea why omg.

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