Hey there! Sign in to join this conversationNew here? Join for free
    Offline

    0
    ReputationRep:
    if the incoming curvture is -0.4, and the power of the lens is 5D, then that would mean that the new curvature is 4.6D, right?
    Offline

    0
    ReputationRep:
    (Original post by HayyanN)
    I got 30 for the conductance. I think the other was in series was 20 s. so I did 1/20 + 30 + 30 which rounded to 30. Is that wrong?
    I got 15 because the two in parrallel were 15 each so 15+15=30 and the other one was 30 on series so 1/30 +1/30 gives 2/30. Inverse = 15
    Offline

    1
    ReputationRep:
    I got a power of 4.6 aswell : )
    Offline

    0
    ReputationRep:
    I thought most of the paper was fine really, the last section on materials being quite tricky considering it was materials which I thought most people deemed perhaps the easier part of the course. The last few questions were very challenging in my opinion and managed only to scribble some working.

    What do reckon as grades for an A guys?
    Offline

    0
    ReputationRep:
    (Original post by Hicko)
    I got a power of 4.6 aswell : )
    HICKO, if you are/were a girl, I would marry you xD Let's hope it's right xD
    Offline

    0
    ReputationRep:
    P.s. I'm on a friend's account, my account name is: "jelmes96"
    Offline

    0
    ReputationRep:
    (Original post by eversonlloyd6)
    HICKO, if you are/were a girl, I would marry you xD Let's hope it's right xD
    I got this also, don't need a marriage proposal though!
    Offline

    3
    ReputationRep:
    haha.... Well I was so unsure about this paper. The maths questions were so obscure, and I would personally say I'm a really good mathematician (for my age that is)....so yeah...I found the writing questions easy. I missed 3 marks. The very last mark, and the 2 other pieces of information from the heart sensor graph. I was like, WTF
    Offline

    0
    ReputationRep:
    I also got 4.6D
    Offline

    0
    ReputationRep:
    Yeah saying that, the heart rate monitor one threw me off a bit. What did people say for the other features the figure gave?
    Offline

    3
    ReputationRep:
    Didn't put anything...only 2 marks
    Offline

    0
    ReputationRep:
    (Original post by SlayerOfTheHero)
    I thought most of the paper was fine really, the last section on materials being quite tricky considering it was materials which I thought most people deemed perhaps the easier part of the course. The last few questions were very challenging in my opinion and managed only to scribble some working.

    What do reckon as grades for an A guys?
    A-43
    B-38
    C-35
    Thought the paper was decent
    Offline

    13
    ReputationRep:
    Very strange paper I thought... Nothing like any of the past ones. Hoping that will lower grade boundaries a bit.
    Offline

    1
    ReputationRep:
    I really do think that us year 12's are the trial year for OCR
    They kind of put all new stuff in the exam which no one has a clue about
    Offline

    0
    ReputationRep:
    What did people put for the why concrete is good under compression and bad in tension. I drew a structure of two different sized atoms bonded together in a random structure. Then I said that when under ension, there is a high concentration for the stress at the tip. The irregularly structure does not allow for slips and hence this results in brittle pcrack propogation through the material. However, the bonds themselves are extremely strong and hence is effective under compression. In hindsight, could have answered it a lot better than this :/
    Offline

    3
    ReputationRep:
    Uh...dropped a mark on the first part.... uh LED and lightbulb graph the wrong way round...FML
    Offline

    3
    ReputationRep:
    Can someone please upload the paper?
    Offline

    10
    ReputationRep:
    Really rough unofficial mark scheme, will be added to when people start commenting.

    1. D (Diode) F (Fixed Resistor) L (Filament Lamp) (3)

    2a) Difficult to scratch or dent (1)
    b) Axe head would become blunt if soft (1)
    c) Tough (1) so axe head does not shatter if a crack forms
    OR Strong (1) so axe head can withstand large forces (1)

    3a)  2 \times 10^{-5} s
    b)  160-20 = 140kHz
    c)  1000

    4a) Current = VG (can't remember values)
    b)  15mS

    5a) 5D
    b) 4.6 D

    6a) 10730J (Is 3sf OK, I settled for 3sf in the end)
    b) Energy / 540s = 20W (to 2sf) / 19.9 W (to 3sf)

    7. no.of levels = 200/0.5 + 1 = 401
    so no. of bits = 9

    8a) i) Directly proportional to each other
    a)ii) Sensitivity = 1.5
    b) 72 bmp
    roughly 113 pressure units
    c) Heart beats last for same time
    Peak pressure heart beats falls then rises then falls...

    9a)i) 0.857 Mbyte < 1Mbyte
    ii) Estimate and then execution.
    b) i)  1.14 \times 10^5 bits^{-1}
    ii) Yes because frequency is higher than the information transfer rate.
    iii) Stops deforestation linked to climate change/ etc. (1)
    Puts people out of jobs/ too expensive for some people to buy appropriate technology/ etc...

    10a) i) Concrete made of stones/ aggregate and cement, which both contribute their properties to the material.
    ii) Any four from these and possibly more:
    Stones are stronger than cement (1)
    Weakest point is at boundary between stones and cement (1)
    Under compression, the stress is concentrated on the stone (1)
    Under tension, the stress is concentrated on the cement (1)
    Brittle fracture occurs sooner in the cement that the stones (1)
    b) i) 5
    ii) 3
    c) i) Stress = F / CSA (1), same force but 5 times CSA leads to 1/5 stress (possibly shown through algebra) (2)
    ii)  1.5 \times 10^8 Pa
    Offline

    13
    ReputationRep:
    What did people get for the 'estimate the factor that the intensity has increased' or something like that, the logarithmic scale thing for the dolphin click question. I put 10^7, then crossed it out and changed to 10^6.7
    Offline

    0
    ReputationRep:
    i put 10^7
 
 
 
Poll
Do you agree with the PM's proposal to cut tuition fees for some courses?

The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

Write a reply...
Reply
Hide
Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.