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

    1
    ReputationRep:
    do we have to use area to calculate charge when calculating the capacitance in the second last question?
    Offline

    22
    ReputationRep:
    (Original post by skeletonboy1)
    yeah as i remember, and we only need to resolve when calculating velocities but no need when calculating K.E. right?
    Yep.
    Offline

    3
    ReputationRep:
    (Original post by omar5478)
    I got 3.41, I believe I calculated it by (6.9 - 6cos30)/cos60 (total horizental momentum before = total horizental momentum after)
    Ah yes. That's what I did! I guess I must have gotten the same, just can't remember it
    Offline

    5
    ReputationRep:
    (Original post by AvWOW)
    yup I did the same.
    haha everyone was saying they remembered it from IGCSE and I was like "what really"
    Oh ffs that actually makes sense. I guess I could say goodbye to the A*
    Offline

    22
    ReputationRep:
    (Original post by omar5478)
    The only irritating question was the change of momentum of the alpha particle, how did you do that ??
    I've forgotten the question, but I think it had something to do with E_k = p^2/(2m) or something along those lines.
    Offline

    3
    ReputationRep:
    (Original post by omar5478)
    Oh ffs that actually makes sense. I guess I could say goodbye to the A*
    Hey that was just 3 marks.. I'm prob losing more than that
    Offline

    1
    ReputationRep:
    (Original post by Zacken)
    I've forgotten the question, but I think it had something to do with E_k = p^2/(2m) or something along those lines.
    yeah i used that equation too but i used a mass of 2u instead of 4u fml
    Offline

    3
    ReputationRep:
    (Original post by skeletonboy1)
    do we have to use area to calculate charge when calculating the capacitance in the second last question?
    Yeah I did
    Offline

    5
    ReputationRep:
    (Original post by Zacken)
    I've forgotten the question, but I think it had something to do with E_k = p^2/(2m) or something along those lines.
    I did that to calculate the initial momentum (7.8 * 10^something) but didn't know how to progress beyond that.

    Edit: I just figured out that this value would be the change of momentum because at minimum seperation there would be no velocity. I didn't write that down though and wrote F = p/t below the calculation, do you know how many marks would I lose ??
    Offline

    0
    ReputationRep:
    (Original post by Zacken)
    I've forgotten the question, but I think it had something to do with E_k = p^2/(2m) or something along those lines.
    A question very similar came up in January 2016
    Question 18 C

    Papers and Markschemes
    https://drive.google.com/folderview?...nR2ZW5PcGhLQWM
    Offline

    1
    ReputationRep:
    for the mc questions:
    deflection is higher or lower?
    momentum change = sqrt(2)p?
    Offline

    22
    ReputationRep:
    (Original post by omar5478)
    I did that to calculate the initial momentum but didn't know how to progress beyond that.
    You'll get a mark at least.
    Offline

    3
    ReputationRep:
    I think I messed up the question about the wavelength. I used E=hf and then c=f(lamda) which I think could be right...
    But then I confused getting Ek. How was that supposed to be done?
    Offline

    22
    ReputationRep:
    (Original post by oli4rg)
    A question very similar came up in January 2016
    Question 18 C)
    https://drive.google.com/folderview?...nR2ZW5PcGhLQWM

    Markscheme
    https://drive.google.com/folderview?...nR2ZW5PcGhLQWM
    Yep, Q16 also came up as Q11 in ours. Q15 came up in ours as well. It's basically the same paper with different numbers.

    (Original post by skeletonboy1)
    for the mc questions:
    deflection is higher or lower?
    momentum change = sqrt(2)p?
    Dunno what the deflection bit you're talking about is. Are you talking about the last question about exiting the field? If so, it exits at C.

    Momentum change = 2p.
    Offline

    1
    ReputationRep:
    (Original post by omar5478)
    I got 3.41, I believe I calculated it by (6.9 - 6cos30)/cos60 (total horizental momentum before = total horizental momentum after)
    3.41 is correct and collision is wlastic
    Offline

    1
    ReputationRep:
    (Original post by omar5478)
    I got 3.41, I believe I calculated it by (6.9 - 6cos30)/cos60 (total horizental momentum before = total horizental momentum after)
    3.41 is correct and collision is elastic
    Offline

    1
    ReputationRep:
    I would say this is quite a fair paper without a lot of those tricky explaining questions that need you to think
    Offline

    1
    ReputationRep:
    Do you divide the wavelength you got by 2?
    Offline

    1
    ReputationRep:
    divided the energy by two... i worried they might deduct marks if i divide the wavelength instead
    Offline

    0
    ReputationRep:
    what did you do in the last part of the capacitor question that a calculation was needed?
 
 
 
  • See more of what you like on The Student Room

    You can personalise what you see on TSR. Tell us a little about yourself to get started.

  • Poll
    What's your favourite Christmas sweets?
  • See more of what you like on The Student Room

    You can personalise what you see on TSR. Tell us a little about yourself to get started.

  • 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

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