A nail is attracted to a magnet. What does this tell you about the nail?
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A. It is harder than the magnet.
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B. It is a poor thermal conductor.
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C. It contains iron.
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D. It is a good electrical conductor.

a  solution  is always transparent, light passes through with no scattering from solute particles which are molecule in size. the  solution  is homogeneous and does not settle out. a colloid is intermediate between asolution  and a  suspension. while asuspension  will separate out a colloid will not.

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