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The Physics PHYA2 thread! 5th June 2013 watch

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    Made this table of past grade boundaries, and I used a trend function to estimate the grade boundaries for this year, eliminating the anomalous June 2009 boundaries, as they were unusually high. Table is attached.
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  1. File Type: xls PHYA2 Grade Boundaries.xls (18.0 KB, 148 views)
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    (Original post by anonymouse01)
    Yeah but there was already another thread. Anyway

    Q3 jan 09 thanks


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    Oh! That was a thread I posted and it has some useless things like my joke. So, few people would visit that post. This one will only be on physics unit 2. You need help on the question? I think yes. Ok lets start. Q3 jan 2009 AQA, is asking for to state Hooke's law. Answer: You can say,(f=kl) force is proportional to stiffness times the extension up to the limit of proportionality/elastic limit. Is there any other question you need help with? And yeah, How the hell did you get your reputation soo bad?
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    (Original post by Qari)
    I have both
    .

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    (Original post by SortYourLife)
    Please can you send?


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    I have posted them above?


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    anyone got the june 2009 paper? the aqa website seems to be missing it for some reason
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    (Original post by Jack93o)
    anyone got the june 2009 paper? the aqa website seems to be missing it for some reason
    http://www.freeexampapers.com/index....W-QP-JUN09.PDF

    http://www.freeexampapers.com/index....W-MS-JUN09.PDF

    Enjoy
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    thanks!
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    I'm a hater and I get hated for being a hater.
    Wait... That thread was a joke? I actually helped you.
    Also. Thanks. What a out jan 08 q4 5 and jan 09 q2


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    (Original post by anonymouse01)
    I'm a hater and I get hated for being a hater.
    Wait... That thread was a joke? I actually helped you.
    Also. Thanks. What a out jan 08 q4 5 and jan 09 q2


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    Hey! I know you helped me but remember I posted 2 readable jokes. Anyway, Do you need any more help? Sorry, I did not understand the last line.And I do not hate you at all.
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    for double slit interference patterns, is it true that for shorter wavelength light, the bright fringes (maximas) would be wider and the dark fringes (minimas) would be thinner? (and the opposite for longer wavelength light)

    I just know that fringe spacing would be bigger. Btw, does the fringe spacing equation apply to both bright and dark fringes, or only bright fringes?
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    Does anyone have the Jan 2009 paper?

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    (Original post by x-Sophie-x)
    Does anyone have the Jan 2009 paper?

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    Here you go

    http://www.freeexampapers.com/index....W-QP-JAN09.PDF

    http://www.freeexampapers.com/index....W-MS-JAN09.PDF

    Hope revision is well
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    http://filestore.aqa.org.uk/subjects...W-QP-JUN11.PDF

    Can someone explain the curve ins 1aii? Thanks
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    (Original post by BenChard)
    http://filestore.aqa.org.uk/subjects...W-QP-JUN11.PDF

    Can someone explain the curve ins 1aii? Thanks
    Y axis v, x axis time. Gradient is v/t which is acceleration. Acceleration is constant so what does this tell you about the line?
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    didn't know there was a january paper in 2009
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    (Original post by Jack93o)
    didn't know there was a january paper in 2009
    Me neither, its only when you guys asked I checked haha thanks

    I imagine a lot of the people sitting the exam don't know!
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    Thank you

    Yes thanks, I hope it is for you too :')
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    can anyone help with June 2010 Q1C?
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    Help please!!

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    (Original post by eilish1903)
    Help please!!

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    This is jut rough aha:

    You'd have two wires of equal length (measured with a ruler) suspended, measuring the diameter of the one you want to determine youngs modulus for with a micrometer, in several places to get an average

    You'd have a set of weights to apply a force to the wire you want to determine the Young's modulus for, the other wire is purely for control, due to temperature changes or whatever.

    You'd apply different forces and note down the force applied and the extension of the wire, measured with the one I've forgotten the name of, starts with a v maybe? And take a few readings with an average found

    Do this for at least 6 forces.

    Plot a graph of force on the y axis and extension on the x, should be a straight line.

    Young's modulus is (force*original length) / (extension*cross sectionalarea)

    You'd find the area using the diameter before and A=(Pi) r^2 for a circle.

    The gradient of the graph sorts out the force over extension, so you'd take the gradient, multiply by the original length of the wire, and divide by the cross sectional area

    Something like that anyways, there may be more points you need to get in
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