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    (Original post by C0balt)
    Oh dear.... Good luck.... I'd definitely speak to the exam officer at your centre though...
    If we're given masses of atoms in a nuclear decay equation for mass defect do we need to subtract the electrons or will they just cancel out?


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    (Original post by C0balt)
    Oh dear.... Good luck.... I'd definitely speak to the exam officer at your centre though...
    Panic over, PHYA5 doesn't define Astro, PHYA5/A does. I am on PHYA5/C which is Applied Physics which is what I've actually studied for... phew!

    Jesus, do not need that sort of stress just before an exam!
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    Good luck, stressed for this
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    For turning points

    Have we ever had a 6 marker about finding h?

    By using photocell and photoeldctric effect?
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    (Original post by Questioner1234)
    If we're given masses of atoms in a nuclear decay equation for mass defect do we need to subtract the electrons or will they just cancel out?


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    I'd say it's worth subrtracting them out, just for peace of mind. Then if you have time try it the other way
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    (Original post by Stormin')
    Panic over, PHYA5 doesn't define Astro, PHYA5/A does. I am on PHYA5/C which is Applied Physics which is what I've actually studied for... phew!

    Jesus, do not need that sort of stress just before an exam!
    Good to hear! Good luck nevertheless
    (Original post by Questioner1234)
    If we're given masses of atoms in a nuclear decay equation for mass defect do we need to subtract the electrons or will they just cancel out?


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    For mass defect no you need not to
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    (Original post by Exams987)
    does anyone know potential 6 markers for both unit 5 and astro
    Reckon something on brownian motion and for astro how stars are formed possibly
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    That was beautiful


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    I AM FREEEE

    Applied was quite good
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    Both papers (Nuclear/Thermal and Astrophysics) went pretty well for me. Hopefully A* in the bag unless I bombed the EMPA.
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    1.22x10^8 AU for the last question in Astrophysics anyone? I think i forgot to square root my answer.

    Also what did you guys write for the first part of the CCD question? Regarding structure.
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    Found the exam to easy quite. I did turning points for optional module

    although one question threw me off, the 4 mark question in turning points that asked to find specific charge I got 2.1 * 10^8 what did other people get?

    since F=Bev and F= Mv^2/r
    I did equated them to each other then rearranged to get
    e/m = v/Br

    "v" mean velocity
    "V" means PD

    To find v (velocity) I did v=V/Br

    so subbed in the v=V/Br into e/m = v/Br to get rid of velocity from the equation to get e/m= V/Br/Br
    which simplified to e/m= V/ B^2 * r^2
    Is that correct?

    Section A was very easy so I don't have any queries about that
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    What did everyone write for the 6 marker on the neucleur section
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    Was it just me or was Section A really long?
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    (Original post by aelahi23)
    Found the exam to easy quite. I did turning points for optional module

    although one question threw me off, the 4 mark question in turning points that asked to find specific charge I got 2.1 * 10^8 what did other people get?

    since F=Bev and F= Mv^2/r
    I did equated them to each other then rearranged to get
    e/m = v/Br

    "v" mean velocity
    "V" means PD

    To find v (velocity) I did v=V/Br

    so subbed in the v=V/Br into e/m = v/Br to get rid of velocity from the equation to get e/m= V/Br/Br
    which simplified to e/m= V/ B^2 * r^2
    Is that correct?

    Section A was very easy so I don't have any queries about that
    It was 1.9 X 10^(something) - definitely not 8 and to same degree as the electron mass ratio given on the data sheet


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    (Original post by kingaaran)
    It was 1.9 X 10^(something)


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    I think I forgot to square B in my calculator so I probably got the wrong answer due to that
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    (Original post by Mattematics)
    Was it just me or was Section A really long?
    The last time I saw so many lines in an answer space was when I did my English Language GCSE.
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    (Original post by marioman)
    The last time I saw so many lines in an answer space was when I did my English Language GCSE.
    You can say that again 👍
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    (Original post by kingaaran)
    It was 1.9 X 10^(something) - definitely not 8 and to same degree as the electron mass ratio given on the data sheet


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    Yeah 1.9


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    (Original post by kingaaran)
    It was 1.9 X 10^(something) - definitely not 8 and to same degree as the electron mass ratio given on the data sheet


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    Swear I got 1.8x10^11, which is basically the specific charge of an electron


    Posted from TSR Mobile edit: charge/mass ratio of electron
 
 
 
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