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Published byGarey Gibson Modified over 8 years ago
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Density The property of density is intensive and is the measure of the ratio of an objects mass to its volume. Density is a physical property of matter. Intensive properties - properties that is independent of the amount of material or sample size. ex: density, boiling point, freezing point Extensive properties - properties that do depend on the amount of material or sample size. ex: volume, length, mass
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If a substance is heavy, such as water, it means that it has a high density. If a substance is light, such as a feather, it means it has a low density. 10kg of water occupies about 10L 10kg of feathers occupy a much larger volume, say 100 L
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Density of common substances SubstanceDensity (g/cm3) Air0.001 Wood0.16 Ethanol0.79 Water1.00 Table Sugar1.59 Table Salt2.16 Iron7.9 Gold19.32
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To calculate the density of an object you take the mass and divide by the volume. Most times the units will be g/mL or kg/L Volume can also be in m3 Practice: a. water b. feathers D = mass volume
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If you know the density of an object and the volume you can caluclate the mass. mass = density x volume If you know the density of the object and the mass you can calculate the volume. volume = mass density
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