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AQA Physics PHYA4 - Thursday 11th June 2015 [Exam Discussion Thread] Watch

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    I know this is a massive stab in the dark, but is anyone likely to be able to take a copy of the paper home? We could then do an unofficial mark scheme for the multiple choice!


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    (Original post by CD223)
    I know this is a massive stab in the dark, but is anyone likely to be able to take a copy of the paper home? We could then do an unofficial mark scheme for the multiple choice!


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    I will give it a try, but unlikely since my college is so. Strict in giving them out. By the way how did you find C4? Wasn't too bad?


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    (Original post by Kennethm)
    I cannot fxcking believe im asking this - how on earth do you do Q3
    http://filestore.aqa.org.uk/subjects...1-QP-JUN14.PDF
    Not sure if you've had this answered, I've done this question seemingly 1000 times.

    velocity is 2x10^-4/7.2x10^-4

    momentum=mv, so just need the mass now

    as density=mass/volume
    volume x density = mass

    therefore, momentum = volume x density x velocity, so (1000x2x10^-4)x(2x10^4/7.2x10^-4)

    hope this works out, I haven't got my calculator on hand
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    As you can tell, I hated. June 2014, does someone mind explaining these?

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    6 Marker Predictions?
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    And this question, Name:  ImageUploadedByStudent Room1433883749.672109.jpg
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    Could someone work through 1C of Jun13 for me? I always seem to come undone on the phase difference questions and the mark scheme doesn't really help me either.

    http://filestore.aqa.org.uk/subjects...2-QP-JUN13.PDF
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    (Original post by Jimmy20002012)
    I will give it a try, but unlikely since my college is so. Strict in giving them out. By the way how did you find C4? Wasn't too bad?


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    Thanks buddy! I hated C4 didn't answer the question on E, and got the implicit differentiation wrong so I lost 10 marks. Hoping I got 100 on C3 to make up for it. What do you think 65/75 will give UMS wise? Desperate for an A*.


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    (Original post by CD223)
    I know this is a massive stab in the dark, but is anyone likely to be able to take a copy of the paper home? We could then do an unofficial mark scheme for the multiple choice!


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    Man, I've been thinking about getting one before that and we can do it, we just need to corporate well. We just need somebody having a good insight into the web. Unfortunately i don't have the required apparatus otherwise that wouldn't be a problem.


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    (Original post by CD223)
    I know this is a massive stab in the dark, but is anyone likely to be able to take a copy of the paper home? We could then do an unofficial mark scheme for the multiple choice!


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    I was thinking of just writing the letters down on my calculator if I get the time, so I've at least got something to compare, even if it's not very helpful without the questions. Can't get hold of the paper though unfortunately :/
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    (Original post by ShutUpLegs)
    Could someone work through 1C of Jun13 for me? I always seem to come undone on the phase difference questions and the mark scheme doesn't really help me either.

    http://filestore.aqa.org.uk/subjects...2-QP-JUN13.PDF
    I think the 'method' for this is to work out a lowest common factor but I don't really get that.

    I've learnt that you can use the difference in time period, then divide the smaller of the two periods by the time difference. This will give you the amount of oscillations the longer period needs to do before they are in phase again.
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    (Original post by Mehrdad jafari)
    Man, I've been thinking about getting one before that and we can do it, we just need to corporate well. We just need somebody having a good insight into the web. Unfortunately i don't have the required apparatus otherwise that wouldn't be a problem.


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    we need the deeeepppp darrkkkk web
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    (Original post by Lau14)
    I was thinking of just writing the letters down on my calculator if I get the time, so I've at least got something to compare, even if it's not very helpful without the questions. Can't get hold of the paper though unfortunately :/
    Yeah, that's a good idea but it would be better knowing the questions too


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    (Original post by Mehrdad jafari)
    Yes, you did but you didn't need to say that he was wrong. The person asked the question had the mark scheme at hand and so he would know whether anybody's suggestion matches the mark scheme or not. And also he would know eventually if he was wrong.

    Well, i don't think his saying that would make anybody feel dumb. The exam is only a few days a head and we should now be able to tackle the problems independently. During the exam there is nobody to help you with the questions. If now you don't want to think hard about a question then you will have difficulty during the exam.



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    Lol are you his boyfriend or something?
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    (Original post by CD223)
    Thanks buddy! I hated C4 didn't answer the question on E, and got the implicit differentiation wrong so I lost 10 marks. Hoping I got 100 on C3 to make up for it. What do you think 65/75 will give UMS wise? Desperate for an A*.


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    It's alright! Was totally opposite for me lost like 12 marks in C3 and think I got around 68 in C4. Even though C4 was my weaker one. You should defiantly get into the 90s I think, think an A will be like 58 or something what you thinking? Sure you will get that A*!


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    (Original post by xela238)
    we need the deeeepppp darrkkkk web
    Actually not anywhere dark, the light comes from the sky


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    (Original post by Mehrdad jafari)
    Actually not anywhere dark, the light comes from the sky


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    not dark if you have sky broadband
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    (Original post by adil1231)
    Lol are you his boyfriend or something?
    If you think so


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    (Original post by Mehrdad jafari)
    Yeah, that's a good idea but it would be better knowing the questions too


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    It would definitely be good to have a copy of the questions yeah! If I don't write my answers down I won't remember what I put anyway.
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    (Original post by JJBinn)
    I think the 'method' for this is to work out a lowest common factor but I don't really get that.

    I've learnt that you can use the difference in time period, then divide the smaller of the two periods by the time difference. This will give you the amount of oscillations the longer period needs to do before they are in phase again.
    It seems like its a given that they're only in phase at the beginning of the oscillation but I can't work out why it won't happen throughout the cycle?

    In future though I can just work it out by finding when they both have gone through an integer number of oscillations?
 
 
 
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