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

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Reply 2300

saad97

Can someone help with 2bi please...

Reply 2301

a.a.k

Original post by palaseum9

Turning points 6 marker preductions??

Turning points - Previous 6 markers:
June 14' - TEM microscopes
June 13' - Hertz radio waves experiment (with stationary waves context)
June 12' - Wave-particle duality of light
June 11' - Double Slit experiment (with reference to Newton's and Huygen's theory of light)
June 10' - STM microscopes

Millikan this year probably???

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Reply 2302

palaseum9

Original post by a.a.k

Millikan this year probably???

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I'd absolutely love such a question

Reply 2303

kevincarreira

can anyone tell me what the last 6 markers have been on?? Sect A and Astro

Reply 2304

Gome44

Original post by saad97

Can someone help with 2bi please...

Use P=σAT^4 where A=4πr^2

Reply 2305

Absent Agent

Original post by a.a.k

Millikan this year probably???

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I will not look at the microscopes at all even if i know they will come up lol

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Reply 2306

saad97

Original post by Gome44

Use P=σAT^4 where A=4πr^2

I have and I've formed a ratio equation but the mark scheme is weird, it's squared one bracket and put the other to the power of 4? :/

Reply 2307

a.a.k

Original post by Mehrdad jafari

You don't need the velocity. Are you talking about the sane question as Jimm asked?
ImageUploadedByStudent Room1434564188.937374.jpg

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When i plug some numbers it 2.2 doesnt turn out .

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Reply 2308

Master Sam

http://filestore.aqa.org.uk/subjects/AQA-PHYA5-2D-QP-JUN13.PDFhey guys could someone please explain to me why in 4 b (iii) after finding the volume the markscheme done mass times volume.I thought if I equated the densities it would be mass divided by volume.thanks in advance :smile:

Reply 2309

CD223

Original post by kevincarreira

can anyone tell me what the last 6 markers have been on?? Sect A and Astro

In the first post of the thread Lau14 has compiled them!

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Reply 2310

Sbarron

Original post by MSB47

Well the original equation for inverse square law for gamma is I=k/x² Right?

If so the k=I_o/4pi and the x represents the distance from the sources.

Hope this makes sense :smile:

But k is on top and 4pi is on the bottom

Reply 2311

Gome44

Original post by saad97

I have and I've formed a ratio equation but the mark scheme is weird, it's squared one bracket and put the other to the power of 4? :/

I have no idea then, but remember you've been given diameter

Reply 2312

SuperMushroom

Original post by CD223

In the first post of the thread Lau14 has compiled them!

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dude when i click it nothing comes up???

http://prntscr.com/7i3s6y

Reply 2313

Nit

For question 4(a)(i) Why do you have to multiply threw by 0.5? Can't figure it out
Thanks
http://filestore.aqa.org.uk/subjects/AQA-PHYA5-2C-QP-JUN12.PDF

Reply 2314

RemainSilent

Glad I dont do turning points as the grade boundaries for astro are quite low (because many schools who have limited sources do astro although not always true)

Reply 2315

saad97

Original post by Gome44

I have no idea then, but remember you've been given diameter

Ah nvm I know what they've done, thanks anyway :smile:

Reply 2316

Sbarron

I know that to produce a real image with a converging lens you need the object more than a focal length away from the lens but how much further for diminished and how much further for magnified??

Reply 2317

betbi3etwerrd

Is stellar evolution even on the spec ?

Reply 2318

toddle1

Do people really think it's likely that deriving the kinetic theory will come up? I would have said it's worth more than 6 marks.

Can they set questions that are worth more than 6 marks?