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

1. (Original post by Bowenabc)
For Q1 in Astro, what is the biggest distance between Vesta and Earth?
4.4x1011m
2. For the 6 marker you had to do calculations,

I did difference in wavelength / wavelength all * C to give the velocity

It was like 2 something x 10 ^ 6

Did anyone do this

Posted from TSR Mobile
3. (Original post by MangoFreak)
It doesn't matter, the electromagnetic force was in play.
No it wasnt as there's no magnetic field and a magnetic field isn't induced as there's no current?
4. (Original post by chizz1889)
It was 2 marks so I'm fairly sure you got one mark for discussing the angle and then the other for saying about IR being absorbed, the clue was the bit which said 'on earth'. I'm fairly sure what I said was worth 2 marks
It would be one mark for the effect and one for the reason
5. (Original post by DomRauba)
doubt it. Has it ever been that high?
Highest it's ever been is 63 for an A* in astro and that paper was harder then this paper
6. (Original post by Puzzled_Logician)
Has anyone else done Applied?
yup .. i got like 65J for the area work question
7. (Original post by MangoFreak)
It doesn't matter, the electromagnetic force was in play.
I wrote both electromagnetic and electrostatic
8. (Original post by Puzzled_Logician)
Can't remember my exact wording (and I've never been good at engine cycle's so I can't assume it is correct) but something like:

More work done as pressure builds; due to adiabatic change going to a greater pressure.
Gas heats up more due to rate of change of pressure increasing (same revolutions per minute).
So power input required goes up as power does.

I can't really remember if those were all the main points I put; but most of them. And it was padded out with some other stuff that may be relevant.
Cool same, AC goes up yeah? and was your paper for section b PHYA5/2C or PHYA5/2CR? Because section a had an R on the end but b didnt?
9. (Original post by kevincarreira)
i said that it was too cool to be a dwarf star although I'm pretty sure I'm wrong now because i was thinking of white dwarf :/
How many marks was it? And how did you find the rest of the paper?
10. (Original post by SuperMushroom)
For the 6 marker you had to do calculations,

I did difference in wavelength / wavelength all * C to give the velocity

It was like 2 something x 10 ^ 6

Did anyone do this

Posted from TSR Mobile
yes, but i got 1.1 * 10^5
11. (Original post by chizz1889)
No it wasnt as there's no magnetic field and a magnetic field isn't induced as there's no current?
You don't understand what the electromagnetic force is.
12. (Original post by chizz1889)
Just 1 for 'state and explain'
Sure?
13. (Original post by DomRauba)
doubt it. Has it ever been that high?
Yeah I really don't think it'll be that high. Me along with everyone else in my school thought astro was hard af.
14. (Original post by Bealzibub)
yup .. i got like 65J for the area work question
Something like that; I got 13 'big' squares for the area; that is all I can remember....
15. (Original post by a.a.k)
I wrote both electromagnetic and electrostatic
How'd you work that into a sentence?
16. Grade boundaries for turning points?????????????
17. (Original post by Bealzibub)
yup .. i got like 65J for the area work question
what the hell was that salt tower thing ?
18. (Original post by Sbarron)
Sure?
Yeah
19. (Original post by SuperMushroom)
For the 6 marker you had to do calculations,

I did difference in wavelength / wavelength all * C to give the velocity

It was like 2 something x 10 ^ 6

Did anyone do this

Posted from TSR Mobile
Would seem you did the difference from the peak of the wave to the trough, whereas you should have used the difference between the peak and the given lab value, giving a speed of 1.1x10^5
20. (Original post by chizz1889)
Poor quality image on earth due to IR being absorbed greatly by atmosphere, even though the angle is larger than smallest possible 😝
I don't think it could be that hard, they haven't said where they put the telescope, thus you'd assume they'd put it in a cool dry place because they want it to work right? But knowing AQA you are probably right, it would just be weird to assume that the people using the telescope put it in a place where it won't work well.

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