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Homework Help: Melting ice

  1. Nov 11, 2007 #1
    200g of steel was placed on a big block of ice.
    The ice was 0 degrees C.
    The metal was 150 degrees C.
    How much ice gets melted?

    My attempt:
    Q=mc(changeinT)
    Q=.2(460)150
    Q=13800

    Q=ML
    13800=M(3.34x10^5)
    M=.041317 kg is melted
    Is this correct?
     
  2. jcsd
  3. Nov 11, 2007 #2

    Kurdt

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    Staff Emeritus
    Science Advisor
    Gold Member

    Looks fine to me.
     
  4. Nov 11, 2007 #3
    If this piece of metal was circular with a radius of 4 cm. How deep would it sink into the ice?

    My attempt:
    M=.041317 kg is melted

    Area of circle = pie x r^2 = pie x .04^2 = 5.02 x 10^-3 m
    Now setup an equation to find the height of the cylinder made.
    Find what volume this would be.
    v=m/d
    = .041317/920
    = 4.49 x 10^-5
    5.02 x 10^-3 x height = 4.49 x 10^-5
    height = 8.944 x 10^-3m
    = .89cm
    Is this correct?
     
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