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    (Original post by nas7232)
    Gl, all my mates are celebrating exams are over. I got 1 left, which is so annoying.

    Good luck!
    I'm off to revise with the lil energy i have left
    ah thats even worse!

    nevermind tho..we'll celebrate..its only tmrw

    im off to bed..thanx for this morning n good luck once again!
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    For the velocity i got a negative number as the change was 20nm towards the blue end of the spectrum. Can anyone confirm this as being right? Overall i thought it was a wierd paper, the passage analysis was so easy and the structured questions were just strange.... Hope i did ok.
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    Yeh...what was explanation for white trail in bubble chamber?

    And what did people draw for the graph involving the charge? I did a sinusoidal one but wasnt sure :/
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    i said bout liquid hydrogen and the electrons ionise the hydrogen to form bubbles..
    ....overall not THAT bad a paper?!
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    (Original post by lgs98jonee)
    Yeh...what was explanation for white trail in bubble chamber?

    And what did people draw for the graph involving the charge? I did a sinusoidal one but wasnt sure :/
    charge doesnt go negative, so i just did one like a magnitude of sinusoidal thing..
    with a period of 0.02s
    n for the white trail i said it was ionisation of hydrogen atoms that left bubbles
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    (Original post by mwah xx)
    i said bout liquid hydrogen and the electrons ionise the hydrogen to form bubbles..
    ....overall not THAT bad a paper?!
    Nope not as bad as some of the past paper qs. (though not as easy as others)
    but i forgot to multiply the damn lead pellet thing by 60!!!!
    I wander how many ive lost from those stupid mistakes.
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    thaw was crap.....now off to revise chem!
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    going by the new exemplar paper we did a few weeks ago, i think it was easy. and going by what everyone's said i think i might have done alright! apart from forgetting to multiply the lead shot thingy by 60.dammit.oh well.
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    (Original post by hajira)
    charge doesnt go negative, so i just did one like a magnitude of sinusoidal thing..
    with a period of 0.02s
    n for the white trail i said it was ionisation of hydrogen atoms that left bubbles
    wat did everyone do for that charge graph?
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    Mine went negative

    it was sinusoidal...
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    (Original post by hajira)
    wat did everyone do for that charge graph?
    period was 0.02s

    was arcs of same peak, it was all on the positive y-axis.
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    i said they were not lined up for the hole thing, but wasnt sure cos a few of my frineds said they lined them up. that was an easier paper then i was expectin , had just under 30 min left. because another exam was startin 1hr 30 min into ours he said ne one who wnats to could leave, i was nearly fniished but not quite. so endin up sitting there foe ages after i finished.
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    (Original post by nas7232)
    period was 0.02s

    was arcs of same peak, it was all on the positive y-axis.
    yup exactly wat i did
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    The period might be 0.01 seconds as there were 2 holes. Not sure about that, anyone know the answer?
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    (Original post by Rupes)
    The period might be 0.01 seconds as there were 2 holes. Not sure about that, anyone know the answer?
    ach...think you might be right
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    (Original post by hajira)
    no..it was 47k ohms!

    so 1.5*25/47025 giving 7.98*10^-4

    n yup i got 36.2k for the temp as well....3*10^7 for electrons
    n erm wat there was some 1.44*10^7 for something in the first question?
    What what what?

    36.2K? Are you sure? not 3.62K?
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    (Original post by lgs98jonee)
    ach...think you might be right
    no.. i period means i complete revolution.. not when you get the same result again... saying that.. you had to have 2 peaks!

    I put two peaks on my graph and left a space between them.. i'm not sure why!
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    here's the graph
    Attached Images
     
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    (Original post by roochis)
    What what what?

    36.2K? Are you sure? not 3.62K?
    woops.. typo

    3.26k :rolleyes:



    Edit: lol yet another one 3.62k !!
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    Isnt there a period of time where I=0 i.e. where there is no overlap whatso ever of the 2 circles. Oh well theres no fussing, its only 2 marks.
 
 
 
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