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    Hmm biology was hardest..additional science.. I think! *-)
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    I agree, Biology was a *****. In fact, if you remember, it wasn't Biology, it was...erm, critical thinking...?...suggestive writing...anyhoo, it was a paper which was designed to discriminate between the "real" thinkers and the ordinary learners, right? :rolleyes:

    Remember, you need 360/400 for an A* in UMS scoring. My harshest calculations suggest:

    B2: 84 UMS
    C2: 92 UMS
    P2: 86 UMS
    ISA: 100 UMS

    Final: 362/400 a low end A*.
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    okay.. wow I'm on a B tho!
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    (Original post by mikoe)
    Is this right: you don't need to learn any formulas for P2 (higher)? I heard they will be given to you (and we just rearrange them). Can someone clarify this for me?
    yeah thats right but they wont give u the units. u need to know them off by heart
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    (Original post by Ahmed_7)
    An ice skater of mass 60kg travelling at a velocity of 3.0m/s bumps into a stationary child skater of mass 30kg on the ice and they move together after the collision.

    A: Calculate the momentum of the ice skater before the collision.
    B: Show that the ice skater and the child skater moved at a velocity of 2.0m/s after the collision.

    (I stole this from AQA's activity sheet )

    60 * 30 = 180kgm/s - momentum of the adult -> momentum is conserved after collision -> 180kgm/s but the total mass changes to 60 + 30 -> 90 -> final speed after collision = momentum / total mass -> 180 / 90 = 2m/s
 
 
 
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