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if you cut the marble into two equal pieces, what will be the density , mass and volume of one of those pieces.

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    density is the same.
    Mass is 1/2 of the original mass.
    Volume is 1/2 of the original volume.
    Since density = mass/volume, taking 1/2 the mass and 1/2 the volume acts to cancel so the fraction of mass/volume doesn't change.

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