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    (Original post by boyyo)
    what optional unit did you do for phya5? (Please dont say astro :/)
    Applied, you?
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    (Original post by notanooblol)
    Applied, you?
    I did astro, I'm hoping that it isnt going to be 60 for an A
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    (Original post by boyyo)
    I did astro, I'm hoping that it isnt going to be 60 for an A
    It won't be 60 for an A. They were predicting 60 for an A*, which sounds about right.
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    (Original post by marioman)
    It won't be 60 for an A. They were predicting 60 for an A*, which sounds about right.
    Ohh yh right, didnt see that, thanks. Do you know what the A grade predictions were roughly
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    (Original post by boyyo)
    Ohh yh right, didnt see that, thanks. Do you know what the A grade predictions were roughly
    Just a really rough guess - 54/75 for an A with Astrophysics option?
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    I thought the Medical Physics Paper was quite nasty, especially that trigonometry question on the eye. Hoping boundaries for that are slightly lower hopefully 58 or 59/60 for an A*? Here's the question if anyone can help figure this out.

    Two bright point sources of light are just resolved as individual images when viewed by a naked eye.

    The sources subtend an angle of 0.13 mrad at the naked eye. The eyeball may be assumed to be spherical with a diameter of 52 mm.

    Calculate the maximum diameter of the receptor used.

    I dunno if this is correct:

    For images to be resolved two stimulated retinal cells must be separated by one stimulated retinal cell.

    Therefore, diameter of three retinal cells:

    tan (0.13/1000) x (52/1000) = 6.76 x 10^-6 m [can also use sin (0.13/1000) because of small angle approximation]

    Max diameter of receptor (retinal cell) = (6.76 x 10^-6 ) / 3 = 2.25 x 10^-6 m (3 sf)

    Only issue with this method is that it assumes there is a right-angled triangle, but I think that's why it said maximum diameter
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    (Original post by marioman)
    Just a really rough guess - 54/75 for an A with Astrophysics option?
    that seems about fair i guess. I think my worst case mark is probably 55/75, that would be 97/98 ums right?(assuming an A is 54)
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    (Original post by boyyo)
    that seems about fair i guess. I think my worst case mark is probably 55/75, that would be 97/98 ums right?(assuming an A is 54)
    Should be. Not long to wait until the actual boundaries come out now.
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    (Original post by marioman)
    Should be. Not long to wait until the actual boundaries come out now.
    Yhh ikr :/ will it be out at midnight tonight, or later on wednseday?
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    (Original post by boyyo)
    Yhh ikr :/ will it be out at midnight tonight, or later on wednseday?
    From approximately 09:30 tomorrow morning according to AQA on Twitter.
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    (Original post by marioman)
    From approximately 09:30 tomorrow morning according to AQA on Twitter.
    Thanks. Its gonna be so nerve racking looking at them
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    Well unit 5 option D boundaries are really nice...the unit 4 are okay but not great but it was an easyish exam....the isa boundaries are nasty but thats to be expected and i really dont see how unit 2 ishigher than last year!!!!??? Im sure people who did unit 2 will attest to this
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    Also, 41/55 for an A* in the EMPA? Seems really high compared to usual.
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    (Original post by marioman)
    Also, 41/55 for an A* in the EMPA? Seems really high compared to usual.
    I expected it to be that high tbh - task 1 was pretty difficult but task 2 was one of the easiest yet, I reckon.
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    (Original post by tanyapotter)
    I expected it to be that high tbh - task 1 was pretty difficult but task 2 was one of the easiest yet, I reckon.
    Task 2 was harrrrddd I was physically sweating after it, your gradient?
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    (Original post by DesignPredator)
    Task 2 was harrrrddd I was physically sweating after it, your gradient?
    i have a feeling it was -1.85? wbu?
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    (Original post by tanyapotter)
    i have a feeling it was -1.85? wbu?
    -1.99, fack
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    (Original post by DesignPredator)
    -1.99, fack
    i think anything between -1.8 and -2.2 should be correct we'll see the mark scheme soon enough, though..
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    (Original post by tanyapotter)
    i think anything between -1.8 and -2.2 should be correct we'll see the mark scheme soon enough, though..
    The EMPA ranges are always a *****
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    Anyone think the boundaries are unusually high or is it just me?
 
 
 
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