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    Please help. it is believed the chocolate bar question is on my mock in 10 mins. HELP NOW
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    Hiya! This is a nice exam thread - I've added it to the Exam Thread Directory 2017

    If you see any other exam threads threads that aren't in the directory yet - let me know by either tagging me in, or linking it in the directory and I can add it in! You can also find discussions for your other exams there.

    If any of your other exams aren't on there yet - feel free to make the exam thread for it yourself

    Good luck in your exams
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    (Original post by T.S.10)
    Hey have u got access to AQA ALEVEL physics set 2 papers, not the AS ones (Alevel ones), if so could you send it to me or post the links in the srudent room.I did the paper and it was sooo diffcult, so I would like to redo some questions again.
    Thanks.

    Yea has any one got this^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ^please
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    What is the uncertainty of a top pan balance? Would it be +-0.005 since we got measurements to 2dp e.g 2.66g ?
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    (Original post by wannabe_lawyer)
    chrome-extension://ecnphlgnajanjnkcmbpancdjoidceilk/content/web/viewer.html?file=https%3A%2F%2Fl earnzone.loucoll.ac.uk%2Fpluginf ile.php%2F194272%2Fmod_resource% 2Fcontent%2F1%2F7407-1%2520Paper%25201%2520QP%2520v1. 1%2520Scanned%2520handwritten%25 20answers.pdf
    Hi, don't know if u still need the answer since u posted a long tiome ago but.. basically, the used the conservation of energy.
    total energy before = KE of positron + rest energy of Positron = rest energy of electron = 2000 + 2(511). Convert this into jouls and you'll get 16.4x10^-14
    total energy after has to equal total energy before, so 16.4x10^-14 is the energy of 2 photons. divide this by two to get the energy of 1 photon = 8.2x10^-14

    hope that helps
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    Do we need to know any practicals for paper 1???
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    (Original post by bubblegum219)
    Do we need to know any practicals for paper 1???
    yes they may ask to describe a method for finding a value experimentally e.g young modulus of a wire or wavelength of light.
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    (Original post by dan1yar18)
    yes they may ask to describe a method for finding a value experimentally e.g young modulus of a wire or wavelength of light.
    Oh ok. thank you
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    Hi,
    Does anybody know how to answer Q1 in the AS level paper 2 specimen paper. I've read the mark scheme for the question but have no idea how some of the answers have been arrived at.
    This is the link to the paper: http://filestore.aqa.org.uk/resource...-74072-SQP.PDF
    Thanks
    Roy
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    (Original post by RoyDylan)
    Hi,
    Does anybody know how to answer Q1 in the AS level paper 2 specimen paper. I've read the mark scheme for the question but have no idea how some of the answers have been arrived at.
    This is the link to the paper: http://filestore.aqa.org.uk/resource...-74072-SQP.PDF
    Thanks
    Roy
    Which specific part of Q1?
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    (Original post by crashMATHS)
    Which specific part of Q1?
    all parts apart from part 2
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    (Original post by not_lucas1)
    What is the uncertainty of a top pan balance? Would it be +-0.005 since we got measurements to 2dp e.g 2.66g ?

    Yes it would be.

    (Original post by RoyDylan)
    Hi,
    Does anybody know how to answer Q1 in the AS level paper 2 specimen paper. I've read the mark scheme for the question but have no idea how some of the answers have been arrived at.
    This is the link to the paper: http://filestore.aqa.org.uk/resource...-74072-SQP.PDF
    Thanks
    Roy
    The uncertainty of something (in this context) is +- 1/2 a degree of accuracy || resolution of the instrument being used.
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    (Original post by HARRYCROOKS)
    Please help. it is believed the chocolate bar question is on my mock in 10 mins. HELP NOW
    Probably too late but I'll put it here for anyone who's curious.

    Microwave ovens

    Microwave ovens have microwave transmitters on the side of them facing towards the opposite side of the microwave. There's a metal cover inside microwave ovens, microwaves reflect off of the cover (fixed end points), this forms a stationary wave.

    Now imagine that your plate (inside the oven) wasn't rotating and you placed a chocolate bar inside the microwave oven, it would result in only certain points of the chocolate bar melting; these positions are the points of near maximum amplitude of the stationary waves formed, otherwise known as the antinodes. You can measure the distance between two of these points (in metres) to work out the wavelength; 2*Distance between 2 adjacent antinodes = wavelength.

    This is why microwave ovens have a rotating disc, to make sure that more is warmed up. It's usually easier for water molecules inside foods to heat up, this causes the surrounding food to warm up. That's why tomatoes (if you've ever tried it) warm up quite a bit once you place them in a microwave oven and other foods don't.
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    Hi, I know this may sound stupid, but i'm getting confused because i don't know what are the exact topics for paper 1 As physics can someone help me please ?
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    (Original post by Lizzy72)
    Hi, I know this may sound stupid, but i'm getting confused because i don't know what are the exact topics for paper 1 As physics can someone help me please ?
    Have a look at the contents page. Shows you the topics needed for paper 1 (anything without "Alevel Only" next to it
    http://filestore.aqa.org.uk/resource...08-SP-2015.PDF
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    Does anyone have a mark scheme for this paper?
 
 
 
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