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    (Original post by philo-jitsu)
    Just going over all the topics before I crack on with past papers, I love the fact that there are no other papers scheduled around this paper, I can just focus on just physics!!

    Can someone answer me why for electron scattering we use lambda=hc/E to determine wavelength rather than de broglie equation? I would have thought as its and electron we would have to use Lambda=h/mv, or are they the same thing but rearranged somehow?

    Oh and am I right in thinking the reason electrons need to be fast enough for relativistic phenomena to come into play is because they only display wave like properties at this speed?

    Thanks for any help!
    Wish I could just focus on Physics; FP3 and S2 both Monday morning.
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    Anyone got a KEY WORDS document?
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    What 6 marker could they ask for astro this year?
    I'm guessing something about Wien's law/Stefan's law, considering they have never asked about that?
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    (Original post by cjlh)
    Wish I could just focus on Physics; FP3 and S2 both Monday morning.
    damn dude, I was moaning about messing up core 4 because I had 4 exams last week, I should shut up lol

    good luck mate
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    (Original post by philo-jitsu)
    I love the fact that there are no other papers scheduled around this paper, I can just focus on just physics!!
    FP2 is the day before it
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    Anyone else dreading the six markers?:/


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    Medical predictions?
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    (Original post by Seclusion)
    What 6 marker could they ask for astro this year?
    I'm guessing something about Wien's law/Stefan's law, considering they have never asked about that?
    What 6 marker could they ask for Wien's and Stefan's law?
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    For those doing the Turning Points module, could someone tell me whether the the proper value of time dilation t0 is in the moving or rest frame? From my research (which is contradicting the mark schemes) I've been going by the fact that 't' is the proper time in the rest frame and 't0' is the time in the moving frame because the time dilated in the moving frame is greater?

    So I've paired up L0 (length is always greatest in the rest frame) with t in the rest frame and L with t0 in the moving frame but the mark schemes indicate that L0 is paired up with t0 meaning time dilated is greatest in the rest frame so I'm dead confused.

    I kind of get the concepts but I look at these questions more from ratio point of view so if anyone could clear up my confusion i'd be grateful.
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    (Original post by ChillGod)
    Look in the unit 4 park of the formula sheet - electric fields. W=QV.

    It's the same just different symbols. Work done and energy is the same. Remember energy is defined as the ability to do work. V is the potential difference. e is the charge, Q.

    Formula just changed to fit electrons in a field.
    omg i feel silly. thank you
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    (for part A, that everyone does) Do we need to specifically know about argon dating? It's not in the CGP book and i don't rate the Nelson whats-it book, load of shite if you ask me. Any thoughts?
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    (Original post by Mango Milkshake)
    I agree, and the boundaries are really high because less people do each module.

    If anyone is asking a question about an optional unit can you please state which unit as to not confuse others. Thanks
    You madame, are wrong.
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    (Original post by beggelton)
    (for part A, that everyone does) Do we need to specifically know about argon dating? It's not in the CGP book and i don't rate the Nelson whats-it book, load of shite if you ask me. Any thoughts?
    Yes it says in the spec. I've came across one question so far on the radioactivity question pack on physicsandmathstutor.com on argon dating. But they did tell you about the ratio in the question.
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    (Original post by cowie)
    Anyone else dreading the six markers?:/


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    Oh man not only do i dislike six markers but we've got two coming up! :puke:
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    (Original post by C0balt)
    Oh man not only do i dislike six markers but we've got two coming up! :puke:
    Design an experiment using classroom apparatus to determine the age of the Universe

    Astro life is hard
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    Hi for estimating the nuclear size using electron diffraction what causes the first minima?
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    (Original post by zjkdnnn)
    Hi for estimating the nuclear size using electron diffraction what causes the first minima?
    Think back to diffraction grating at AS Physics. So: d sin (theta) = n(lambda). It's the first minima you're talking about so discard n as it = 1. This gives you d sin(theta) = lambda. Rearrange to find d: d = lambda/sin(theta) but they seem to convert it into d = (1.22 x lambda)/ sin(Theta) for diameter of an nucleus and then d = (0.61 x lambda)/ sin(Theta) for radius.
    correct me if i'm wrong..

    https://www.youtube.com/watch?v=L0q8u0N5K_Y
    this guy explains it very well
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    Do we need to be able to fully derive the equation for the pressure of an ideal gas? I kind of get it but not sure how it'll come up in the exam.
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    (Original post by treeporn)
    For those doing the Turning Points module, could someone tell me whether the the proper value of time dilation t0 is in the moving or rest frame? From my research (which is contradicting the mark schemes) I've been going by the fact that 't' is the proper time in the rest frame and 't0' is the time in the moving frame because the time dilated in the moving frame is greater?

    So I've paired up L0 (length is always greatest in the rest frame) with t in the rest frame and L with t0 in the moving frame but the mark schemes indicate that L0 is paired up with t0 meaning time dilated is greatest in the rest frame so I'm dead confused.

    I kind of get the concepts but I look at these questions more from ratio point of view so if anyone could clear up my confusion i'd be grateful.
    Bro, it just all confuses me. I just think of the example of the twins. The travelling twin is t0 and L0 because to the outside observer, his spaceship contracts. He is t0 because when he comes back to earth, his twin is way older than him. I just keep that in mind when sense checking my answers.
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    Guys do we need to know how to derive PV=nRT and PV=nKT ???? If so, how do we derive it
 
 
 
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