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    How did people find it.,.standrdising is gonna b LOw on that 1...wat was the condition for the grav potential Q???
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    yer, not the easyest paper

    I said height must be measured from a point relative to both, e.g the center of earth since if measured to surface, this would not be constant
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    the object's weight sounds like a better answer, or more exactly the gravitational field strength, g.

    What did people get for the charge stored on the capacitor?
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    the equivalent capacitor was 4uF
    Therefore the pd across on of them is 24/2 (because the 2 were the same)
    Therefore using .5*C*V^2
    .5 * 4uF * 12^2
    =288uC
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    was it CHARge
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    Ufk
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    Charge, for sure.
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    (Original post by mackin boi)
    was it CHARge
    had to work yout ccharge - i and peopls in my school got 48 micro C

    I found phy 5 easier than phy 4 - think i did good

    was one prob:

    It was ok i think...few things i was confused on - teh reading on the scale for the first question - I did the sum of the weight and the centrapetal force, but not suer wheth i was right in adding it - was a 4 mark qeutsion so thought using just F=mg was not right :rolleyes:

    how'd you guys find it?

    PK
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    (Original post by mockel)
    Charge, for sure.
    darn i dids enrgy
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    phy5 was so easy! I'm so happy, phy4 was really hard for me though. I got the same answer as phil too, i used 2 methods to make sure it was correct. 6 marks on transformer was a gift and the practical/graph experiments.
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    u had to show that the three circles around the earth were the same hieght from each other i.e. r 2r 3r from the earths surface
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    (Original post by mackin boi)
    u had to show that the three circles around the earth were the same hieght from each other i.e. r 2r 3r from the earths surface
    really? - i thought it was an inverse proportion - i.e. teh radius of the circles increse with every equiipotentail - well thats what i did

    phil
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    i put it as inverse square aswell :confused: , equipotetntials get more spread out.
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    But they said "with the equipotentials an equal distance from each other" or something, didn't they? :confused:
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    Can't remember the question, was it equipotentials of equal g.p.e.

    Therefore, it must be an inverse square law. I lost 2 marks on the explannation bit i think, but that's about all of the marks i lost i hope. I blagged it about making sure equipotentials are not too far out and the Earth's mass needs to stay the same lol. What did everyone else write?
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    thats wat i put as well, but equipotential lines spread out further as you move away from the earth so im not sure.
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    Oh right. Maybe it was =\
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    i asked ma teacher and the lines had to be equidistant from one another
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    (Original post by mockel)
    But they said "with the equipotentials an equal distance from each other" or something, didn't they? :confused:
    lol...yes...that didn't imply the physical distane between them! i think it meant the magnitude of the equipotentials (teh actual differences)

    i.e. 1x10^7 is first

    2x10^7 is second
    3x10^7 is thrid one -etc

    phil

    at least i hope that's what it meant - if not - them i'm gonna get the kick from oxford:eek:
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    (Original post by nas7232)
    Can't remember the question, was it equipotentials of equal g.p.e.

    Therefore, it must be an inverse square law. I lost 2 marks on the explannation bit i think, but that's about all of the marks i lost i hope. I blagged it about making sure equipotentials are not too far out and the Earth's mass needs to stay the same lol. What did everyone else write?

    lol - defiition? said that sperical shell around the earth on which the potential is the same is the same on any point

    didn't know what else to write
 
 
 
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