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A2 Physics Thread

I was asked to make this thread by someone, it is for those who are doing A2 Physics and want to either discuss the subject or if you are struggling with the subject, an opportunity to post your query and get help :smile:

Link to past papers on different exam boards : (As well as specifications)

AQA :
Physics A : http://www.aqa.org.uk/subjects/science/a-level/physics-a-2450

Physics B : http://www.aqa.org.uk/subjects/science/a-level/physics-b-physics-in-context-2455

WJEC : http://www.wjec.co.uk/index.php?subject=96&level=21&list=paper

OCR :
Physics A : http://www.ocr.org.uk/qualifications/as-a-level-gce-physics-a-h158-h558/

Physics B : http://www.ocr.org.uk/qualifications/as-a-level-gce-physics-b-advancing-physics-h159-h559/

Edexcel : http://www.edexcel.com/quals/gce/gce08/physics/Pages/default.aspx

Useful Youtube channel for those who are stuck on topic :
http://www.youtube.com/watch?v=8wZugqi_uCg&list=PL850CDD4E0BF92102

Disclaimer: I personally don't do physics, but made this thread for those who do :smile:

Reply 1

audi_turbo

Original post by DavidYorkshireFTW

Disclaimer: I personally don't do physics, but made this thread for those who do :smile:

thanks, that's very kind of you.

I personally can't rate Khan Academy enough for physics, it helped me so much.

Reply 2

DavidYorkshireFTW

Original post by audi_turbo

thanks, that's very kind of you.

I personally can't rate Khan Academy enough for physics, it helped me so much.

Thank you

Khan Academy is extremely good!

Reply 3

Kallisto

Entertainment Forum Helper

Thank you again!

Now, I'm here. I want to know more about the resolution at a microscope and the numerical aperture. It would be helpful, if someone has experiences in handling of a microscope. Anyone who want to help me?

Reply 4

Rucksapps

Not sure if this is the right place to post this, bit of a noob, but basically, if anybody is taking OCR G485, for 5.5.2 evolution of the universe, on the spec it reads, ' (c) describe qualitatively the evolution of the universe 10^-43 s after the big bang to the present'.

My question was, do we have to be able to state the events that were happening in a time period, (e.g. roughly between 10^-43 s and 10^-3 s, the four fundamental forces separated), or, the specific time after the big bang and temperature of the universe when those events happened? E.g. at 10^-34 s after big bang, at 10^22K temperature, gravitational force separated from the other forces...)

If anybody can answer, thanks!

Posted from TSR Mobile

Reply 5

MiaSmithy

Hi,

Does anyone have the june 1013 g485 paper?

It would be really useful,

Thanks :smile:

Reply 6

raqueloliveira

Heey everyone!

I need help! I have physics coursework tomorrow, and I have to do an experiment to prove the equation V=Vo x e^-t/RC. Any ideas what should i do?

Reply 7

Stonebridge

Original post by raqueloliveira

Heey everyone!

I need help! I have physics coursework tomorrow, and I have to do an experiment to prove the equation V=Vo x e^-t/RC. Any ideas what should i do?

http://www.cyberphysics.co.uk/topics/electricity/higher_electricity/capacitorDischarge.htm

Reply 8

Kallisto

Entertainment Forum Helper

I made considerations in term of the Compton effect. This effect means that a photon give an electron a momentum, so the electron moves. At the same time, the wavelength of the photon is increased, its longer than before the momentum. So far so good.

And now I consider that the energy level of a photon must be decrease after the momentum, as the longer the wavelength the lesser the energy level of a photon. I guess that a certain amount of energy was transferred to the electron after momentum. Am I right with my considerations?