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

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Reply 2280

Jimmy20002012

Original post by Mehrdad jafari

Sorry, i derived the equation incorrectly, my mind is shut down
ImageUploadedByStudent Room1434563035.568777.jpg

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Could you tell me where you have got this from?

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Reply 2281

SuperMushroom

Original post by Sbarron

What's diminished please?

The image produced is smaller than the object

Reply 2282

CD223

Original post by SuperMushroom

Can you add my option i suggested? about the life cycle of a star and what happens at different solar masses, i personally think its a great 6 marker and could
certainly come up

Ah the survey is only on section A, and not Astro sorry!

I figured I should do section A only as it will benefit everyone haha. I personally think your suggestion is likely though.

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Reply 2283

SuperMushroom

Original post by CD223

Oh sorry how did i not realise that haha, and yes i just thought there has never been a 6 marker on stars so lets hope so

Reply 2284

Absent Agent

Original post by Jimmy20002012

Could you tell me where you have got this from?

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It's in the official AQA notes
ImageUploadedByStudent Room1434563473.021502.jpg

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Reply 2285

Jed-Singh

Original post by AR_95

Just a note

Ionisation Chambers, and Radiation monitoring could also come up tomorrow

for section A? what could they ask?

Reply 2286

MSB47

Original post by Sbarron

Also I don't understand why there is a k constant if we never use it?

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:

Reply 2287

Gome44

Original post by AR_95

Just a note

Ionisation Chambers, and Radiation monitoring could also come up tomorrow

Lol what the hell is an ionisation chamber?

I am so screwed for this exam :/

Reply 2288

AR_95

Original post by Jed-Singh

for section A? what could they ask?

What you're expected to see by Alpha and Beta particles e.g the traces left

How a radiation film badge works

Reply 2289

MSB47

Original post by CD223

I honestly hope the 6 marker for astro is stellar evolution and not big bang :/

Reply 2290

boombozx

what happened to the past 6 marks questions

Reply 2291

Plz help

Jun11 MEDICAL PHYSICS
Q1b - why do you minus image distance (v) from object distance (u) to get focal length.
1/f = 1/u - 1/v ?????

(edited 8 years ago)

Reply 2292

CD223

Original post by MSB47

I honestly hope the 6 marker for astro is stellar evolution and not big bang :/

Big Bang came up last year so it's unlikely.

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Reply 2293

a.a.k

Original post by Mehrdad jafari

It's in the official AQA notes
ImageUploadedByStudent Room1434563473.021502.jpg

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Still does work for me. Solution plz.
Thnx

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Reply 2294

Lau14

Original post by MSB47

I honestly hope the 6 marker for astro is stellar evolution and not big bang :/

It was big bang last year wasn't it? So very unlikely to come up again! Stellar evolution does seem pretty likely.

Reply 2295

kevincarreira

i revised the **** out of this exam i better be getting that A*!!!!

Reply 2296

Absent Agent

Original post by a.a.k

Still does work for me. Solution plz.
Thnx

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Sorry, how do you mean?

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Reply 2297

a.a.k

Original post by Mehrdad jafari

Sorry, how do you mean?

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I am trying to work out velocity from k.e (k.e =eV right??) But keep getting (v) as bigger than speed of light. :dontknow:

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Reply 2298

Sbarron

Original post by SuperMushroom

The image produced is smaller than the object

Thanks

Reply 2299

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