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Twelve specimens appear to be made of the same material, but are they? Students measure each specimen's mass and volume (by liquid displacement or calculation) to determine density. A graph of the mass and volume data reveals 2 lines whose slopes are the densities of the 2 materials.
Detailed instructions describe how to measure volume using a graduated cylinder, calculate the volume of a cylinder from its radius and length, and use a ruler most precisely and accurately.
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