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    (Original post by jirapat121)
    i got 3.2D
    I also got 3.2D..

    Edit: Need to get -0.8 from -4 so +3.2D, think..
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    (Original post by Alex Gerrow)
    The answer to the first question was negative (the sign was already on the paper)
    I was 4.8 if you put u as negative and 3.2 if you put it as positive. I tried both and guessed 3.2 because both measurements were on the same side of the lens but i really don't know...
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    so it's 3.2 right?
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    (Original post by LJflowrie)
    I was 4.8 if you put u as negative and 3.2 if you put it as positive. I tried both and guessed 3.2 because both measurements were on the same side of the lens but i really don't know...
    I thought it was negative because when you worked it out in the question above, there was a negative sign on the answer already?
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    what did anyone get for the 2, 3 markers on alloys
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    (Original post by SheLikeTheMango)
    I thought it was negative because when you worked it out in the question above, there was a negative sign on the answer already?
    It probably was to be honest, hopefully i might get one method mark? I was rushing the first page because our invigilators hadn't given us formulae booklets before they started the exam so i didn't have one for the first 5 minutes which was really annoying...
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    (Original post by Alex Gerrow)
    I got 4.8, but don't think I did very well this year!
    I got the same but looking back i think the answer was something negative
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    Did everyone think it was reasonably hard then? Any ideas on grade boundaries?
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    I had 4.8 because the negative becomes positive on the other side. I put A for cable and D for crumple zone because it had a large plastic zone and a low youngs modulus, I thought the other plastic alloy would be to stiff.
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    (Original post by MrPenguinPerson)
    Was that A for the first and D for the second? If so I think I got the same
    don't you have to talk about the microstructure of the materials? about dislocations and sliip ?
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    (Original post by jirapat121)
    don't you have to talk about the microstructure of the materials? about dislocations and sliip ?
    Yeah, i talked about how the alloy would pin the dislocations in place and things like that.
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    (Original post by MrPenguinPerson)
    Was that A for the first and D for the second? If so I think I got the same
    yeah it was
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    I did DAB for the materials. I panicked during the paper and did not properly talk about microstructure.
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    (Original post by Adem192)
    Yeah, i talked about how the alloy would pin the dislocations in place and things like that.
    Yeah it said also to state a reason why you picked it based on the graph and why the material acts this way from the microstructure
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    The question about the bird frequency was so weird, I don't understand what do they mean by aspects?!?
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    Loved that potato question, so glad it came up - it was about the only thing I actually revised!
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    (Original post by GabrielSmith1998)
    I did DAB for the materials. I panicked during the paper and did not properly talk about microstructure.
    I didn't talk about microstructure either. I saw that it was 3 marks so i assumed 1 for the choice of alloy and 2 for explaining why (young's modulus, stress, stain, plastic region) so if microstructure is needed its probably only worth 1 mark for each (hopefully anyway)
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    That was the WORST paper. That's coming from a person who found last year's fine. **** YOU OCR
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    (Original post by Zallin98)
    Did everyone think it was reasonably hard then? Any ideas on grade boundaries?
    Defo between 40-45 for an A. Would be surprised if its was higher than 46 or something.
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    (Original post by LJflowrie)
    I didn't talk about microstructure either. I saw that it was 3 marks so i assumed 1 for the choice of alloy and 2 for explaining why (young's modulus, stress, stain, plastic region) so if microstructure is needed its probably only worth 1 mark for each (hopefully anyway)
    It's 1 mark for correct choice.
    1 mark for explaining why it is good for this application
    1 mark for explaining the microstructure
 
 
 
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