Turn on thread page Beta

AQA Physics PHYA4 - 20th June 2016 [Exam Discussion Thread] watch

    Offline

    2
    ReputationRep:
    (Original post by shuu00)
    Omg was N the mass of the original nucleus or the daughter nucleus?
    Daughter
    Offline

    2
    ReputationRep:
    What was the time taken for V to decrease to 0.2Vo?


    Posted from TSR Mobile
    Offline

    15
    ReputationRep:
    Poll: http://www.thestudentroom.co.uk/show....php?t=4176490
    Offline

    14
    ReputationRep:
    (Original post by Mango Milkshake)
    Daughter
    Well ****. Thats 6 marks out the window lol.
    • Political Ambassador
    • Welcome Squad
    Offline

    8
    ReputationRep:
    Political Ambassador
    Welcome Squad
    (Original post by Rid123)
    Paper was pretty standard, six marker was nice comparmed with past papers,
    Question one calculations i got
    8.3mF
    3.7×10^-5 j
    36s
    77000ohms

    Then 6.06×10^6 for venus radius??

    216 nuleons
    V=mv/N
    Limitation small angle approximation?
    I got 8.1 μF

    Can't remember the rest uh
    Offline

    7
    ReputationRep:
    (Original post by Rid123)
    Last question on adv and disad of the different braking??
    I put advan is the EM brakes wont wear down as much as the other ones with the pads
    And dis EM brakes nore expensive?? Idk i dont think got either of them ahaha
    I put the same theres no friction as moving parts not in contact so less wear and EM must be more expensive and theres the cost of all that electricity too
    Offline

    13
    ReputationRep:
    What was the unit - I worked it out to be C^2 kg^(-2)?
    Offline

    3
    ReputationRep:
    what was the limitations questions on about? please
    Offline

    11
    ReputationRep:
    Disadvantage for EM brakes - if your electrical system fails in your car, you won't be able to brake
    Offline

    1
    ReputationRep:
    (Original post by Beautywithabrain)
    Oh sh*t! Praying for low grade boundaries now
    It was 28 seconds
    Offline

    2
    ReputationRep:
    (Original post by kingaaran)
    What was the unit - I worked it out to be C^2 kg^(-2)?
    Yup :yes:
    Offline

    0
    ReputationRep:
    can anyone put up how they did the momentum of alpha question? i couldn't do it but i wanna see if i got any of the method marks
    • Political Ambassador
    • Welcome Squad
    Offline

    8
    ReputationRep:
    Political Ambassador
    Welcome Squad
    (Original post by duncant)
    got this but I got RC=28s? 45/-ln(0.2)
    I think I did the same as you did but I only got 28 seconds after rounding my answer up.
    Offline

    2
    ReputationRep:
    (Original post by rich1334)
    Disadvantage for EM brakes - if your electrical system fails in your car, you won't be able to brake
    I wrote car takes longer to stop. No idea if its right
    Offline

    20
    ReputationRep:
    Would saying that the constant magnetisation and demagnetisation of the electromagnet would waste energy be a valid disadvantage?

    Also, I accidentally put T^2 on the x axis and l on the y axis in the 6 marker - how many marks would I lose for that?
    Offline

    0
    ReputationRep:
    Multiple Choice Answers:
    A B B D B C D A B C B A C A C A B A C A A D C B D
    Offline

    2
    ReputationRep:
    (Original post by exmerelda)
    can anyone put up how they did the momentum of alpha question? i couldn't do it but i wanna see if i got any of the method marks
    (Original post by exmerelda)
    can anyone put up how they did the momentum of alpha question? i couldn't do it but i wanna see if i got any of the method marks
    use the equation they give yiu in the previous part to work out the kinetic energy of alpha, work out speed, times by mass to give momentum
    Offline

    1
    ReputationRep:
    (Original post by 09aghandhi)
    spent every bloody holiday in the library, revised for hours, and except 6 marker this was **** for me. Even worse, apparently im the only person who found it hard, so high boundaries. a D if i'm lucky. I'll just take a gap year, then try get into an apprenticeship. AAB required for surry, physics won't be more than a C after this.
    i feel u bro.... ive tried so flipping hard all year but after that i'll be surprised if i got a D
    Offline

    0
    ReputationRep:
    (Original post by Rid123)
    Last question on adv and disad of the different braking??
    I put advan is the EM brakes wont wear down as much as the other ones with the pads
    And dis EM brakes nore expensive?? Idk i dont think got either of them ahaha
    I put slow down quicker with stronger magnets
    Disadv was may not work in wet conditions

    Prob bs but thats what i put
    Offline

    0
    ReputationRep:
    Had an absolute mare for this and completely missed out the final question, for some reason thought it was the end of the paper after the 6 marker question up to the 4g one. Can anyone tell me how many marks question 5 was out of?
 
 
 
Reply
Submit reply
Turn on thread page Beta
Updated: January 9, 2017
The home of Results and Clearing

2,554

people online now

1,567,000

students helped last year

University open days

  1. Sheffield Hallam University
    City Campus Undergraduate
    Tue, 21 Aug '18
  2. Bournemouth University
    Clearing Open Day Undergraduate
    Wed, 22 Aug '18
  3. University of Buckingham
    Postgraduate Open Evening Postgraduate
    Thu, 23 Aug '18
Poll
A-level students - how do you feel about your results?

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.