Join TSR now and get all your revision questions answeredSign up now

The Physics PHYA2 thread! 5th June 2013 Watch

  • View Poll Results: What mark do you think you got out of 70?
    0-20
    6
    3.02%
    21-40
    11
    5.53%
    41-50
    29
    14.57%
    51-60
    79
    39.70%
    61-70
    74
    37.19%

    Offline

    0
    ReputationRep:
    (Original post by yorkshire.lad)
    I got 1.07J i believe,
    I rounded it up to 2.s.f, although I did the area of a trapezoid + the area of the triangle to get it, but I'm sure they'd accept 2.s.f as well.
    Offline

    0
    ReputationRep:
    I was so happy that moments didn't come up i would've lost all of those marks
    Offline

    2
    ReputationRep:
    So the intensity of red light is lower right?
    And I read the volume of the sphere formula wrong (yes I know) and I thought it was r2 instead of r3. I'm only going to lose a mark for that right?


    Posted from the TSR iPad app
    Offline

    2
    ReputationRep:
    (Original post by DthNte)
    It was 1.0J as it was to 1 significant figure But hopefully they'll accept anything around that.
    They don't care about sig fig except in the question where it says appropriate sig fig. (For some reason, that question I decided to give the answer unrounded, but all the others did it to the 2 sig fig in the question :/ )
    Offline

    0
    ReputationRep:
    Did anyone else get 9.2m.s-2 for the acceleration of the glider?
    Offline

    0
    ReputationRep:
    (Original post by nich01as)
    Yes yes and yes
    fantastisch
    Offline

    0
    ReputationRep:
    Stalkers lecture on the total internal reflection conditions seemed to have proved to be helpful.
    Offline

    0
    ReputationRep:
    (Original post by Tuya)
    So the intensity of red light is lower right?
    And I read the volume of the sphere formula wrong (yes I know) and I thought it was r2 instead of r3. I'm only going to lose a mark for that right?


    Posted from the TSR iPad app
    I did exactly the same with the sphere, kicking myself!
    Offline

    0
    ReputationRep:
    (Original post by Max28)
    Did anyone else get 9.2m.s-2 for the acceleration of the glider?
    Definitely, I think a few will make mistakes on this for not converting to mass
    Offline

    0
    ReputationRep:
    (Original post by Max28)
    Did anyone else get 9.2m.s-2 for the acceleration of the glider?
    Yeah I got that as well, I thought calculated it incorrectly, phew.
    Offline

    17
    ReputationRep:
    I only realised the pythagoras part of q1 near the end and got it in with like 20 seconds to spare lol. I used to 6100N value on 1c so would I be penalised for that?
    Offline

    2
    ReputationRep:
    Btw, any thoughts on the 100% ums mark? The mean of previous years in 60, with 57 being the lowest, 69 being the highest, and 62 being the second highest. Any thoughts? Harder than normal, easier? Thanks.
    Offline

    0
    ReputationRep:
    (Original post by IWantSomeMushu)
    I only realised the pythagoras part of q1 near the end and got it in with like 20 seconds to spare lol. I used to 6100N value on 1c so would I be penalised for that?
    Yeah, they normally give 2 answers on the mark scheme, one of them is when you use the rounded value.
    Offline

    2
    ReputationRep:
    (Original post by IWantSomeMushu)
    I only realised the pythagoras part of q1 near the end and got it in with like 20 seconds to spare lol. I used to 6100N value on 1c so would I be penalised for that?
    You shouldn't be, questions where you could get different answers depending on whether you use rounded/unrounded answers are generally given a range of correct answers.
    Offline

    0
    ReputationRep:
    (Original post by nich01as)
    Btw, any thoughts on the 100% ums mark? The mean of previous years in 60, with 57 being the lowest, 69 being the highest, and 62 being the second highest. Any thoughts? Harder than normal, easier? Thanks.
    Around 60-61 because there was many places where many people would get caught out


    Posted from TSR Mobile
    Offline

    0
    ReputationRep:
    (Original post by DthNte)
    It was 1.0J as it was to 1 significant figure But hopefully they'll accept anything around that.
    I got 1.1J, do you think they'll allow that? My answer was 1.075J.
    Offline

    0
    ReputationRep:
    Used area of sphere accidentally instead of volume when calculating weight. How many marks will i lose? I wrote out formula so examiner can see where i went wrong.
    Offline

    0
    ReputationRep:
    (Original post by Zakee)
    I got 1.1J, do you think they'll allow that? My answer was 1.075J.
    I got the same answer, there will be a range of accepted values, and 1.1 will be in there
    Offline

    9
    ReputationRep:
    (Original post by nich01as)
    Btw, any thoughts on the 100% ums mark? The mean of previous years in 60, with 57 being the lowest, 69 being the highest, and 62 being the second highest. Any thoughts? Harder than normal, easier? Thanks.
    Which paper was it 69 for???! I would think around 60 maybe for this paper.
    Offline

    10
    ReputationRep:
    What did people draw for the red light thing?

    I had the maximum intensities the same but the fringes wider. I measured it so that all the other fringes were half the size of the central maximum.

    I hope I'm right.
 
 
 
Poll
If you won £30,000, which of these would you spend it on?

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.