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

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    What will the six marker be on?

    VOTE HERE:
    http://www.poll-maker.com/poll340727x7b2b4474-13


    Good luck tomorrow guys!


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    Just a note

    Ionisation Chambers, and Radiation monitoring could also come up tomorrow
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    (Original post by Jimmy20002012)
    Can anyone help me on second part of this question doing turning points don't seem to know how to do it?

    Attachment 431077


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    Sorry, i derived the equation incorrectly, my mind is shut down
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    (Original post by CD223)
    What will the six marker be on?

    VOTE HERE:
    http://www.poll-maker.com/poll340727x7b2b4474-13

    Good luck tomorrow guys!


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    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
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    When talking about discharge tubes, during the discovery of electrons, some revision notes say they are produced through thermionic emission from the cathode, but others say the electrons come from the low pressure gas in the tubes being ionised due to the high potential difference, releasing electrons in the process.

    Which is correct and in which context are they needed?
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    What's diminished please?
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    (Original post by Mehrdad jafari)
    Sorry, i derived the equation incorrectly, my mind is shut down
    Name:  ImageUploadedByStudent Room1434563035.568777.jpg
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    Could you tell me where you have got this from?


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    (Original post by Sbarron)
    What's diminished please?
    The image produced is smaller than the object
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    (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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    (Original post by CD223)
    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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    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
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    (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
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    (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?
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    (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=Io/4pi and the x represents the distance from the sources.

    Hope this makes sense
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    (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 :/
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    (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
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    (Original post by CD223)
    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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    I honestly hope the 6 marker for astro is stellar evolution and not big bang :/
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    what happened to the past 6 marks questions
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    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 ?????
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    (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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    (Original post by Mehrdad jafari)
    It's in the official AQA notes
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    Still does work for me. Solution plz.
    Thnx

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