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

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Reply 2940

a.a.k

Original post by MangoFreak

It doesn't matter, the electromagnetic force was in play.

I wrote both electromagnetic and electrostatic

Reply 2941

normanjones

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?

Reply 2942

TheRAG

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?

Reply 2943

DomRauba

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

Reply 2944

MangoFreak

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.

Reply 2945

Sbarron

Original post by chizz1889

Just 1 for 'state and explain'

Sure?

Reply 2946

DanTheMan358

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.

Reply 2947

Puzzled_Logician

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....

Reply 2948

MangoFreak

Original post by a.a.k

I wrote both electromagnetic and electrostatic

How'd you work that into a sentence? :tongue:

Reply 2949

natsciballer

Grade boundaries for turning points?????????????

Reply 2950

normanjones

Original post by Bealzibub

yup .. i got like 65J for the area work question

what the hell was that salt tower thing :frown:

Reply 2951

chizz1889

Original post by Sbarron

Sure?

Yeah

Reply 2952

EconFan_73

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

Reply 2953

Dreaming Dreamer

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.

Reply 2954

Puzzled_Logician

Original post by normanjones

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?

Yeah; exactly.

Had the PHYA/2C paper, there was only an R on part A...

Reply 2955

k9000

Original post by natsciballer

Grade boundaries for turning points?????????????

67~68 cap, 62a*, 55 a

Reply 2956

username1432214

Original post by Puzzled_Logician

Something like that; I got 13 'big' squares for the area; that is all I can remember....

yup i got 13 too!

Did you get something like 55.6667 * 10^-3 for moment of intertia question

Reply 2957

username1432214

Original post by normanjones

what the hell was that salt tower thing :frown:

I had no ****ing idea .. lol

I just left it

Reply 2958

Sbarron

Original post by Ninja_heel

Highest it's ever been is 63 for an A* in astro and that paper was harder then this paper

Is that for full UMS? I MIGHT be ok if it's 63.... I think I got around 60 but I'm looking for 113 ucas points :frown:

Reply 2959

DomRauba

Original post by EconFan_73

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