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Chapter 2 Section 2 Units of Measurement Density & Volume

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Derived SI Units Combinations of SI base units form derived units. pressure is measured in kg/ms 2, or pascals Section 2 Units of Measurement Chapter 2

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Derived SI Units, continued Volume Volume is the amount of space occupied by an object. Length x width x height The derived SI unit is cubic meters, m 3 The cubic centimeter, cm 3, is often used The liter, L, is a non-SI unit 1 L = 1000 cm 3 1 mL = 1 cm 3 ← Memorize this one ! Section 2 Units of Measurement Chapter 2

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Click below to watch the Visual Concept. Visual Concept Section 2 Units of Measurement Volume Chapter 2

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Click below to watch the Visual Concept. Visual Concept Measuring the Volume of Liquids Section 2 Units of Measurement Chapter 2

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Derived SI Units, continued Density Density is the ratio of mass to volume, or mass divided by volume. Section 2 Units of Measurement The derived SI unit is kilograms per cubic meter, kg/m 3 g/cm 3 or g/mL are also used Density is a characteristic physical property of a substance. Chapter 2

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Derived SI Units, continued Density Density can be used as one property to help identify a substance Section 2 Units of Measurement Chapter 2

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Sample Problem A A sample of aluminum metal has a mass of 8.4 g. The volume of the sample is 3.1 cm 3. Calculate the density of aluminum. Section 2 Units of Measurement Derived SI Units, continued Chapter 2

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Derived SI Units, continued Sample Problem A Solution Given: mass (m) = 8.4 g volume (V) = 3.1 cm 3 Unknown: density (D) Solution: Section 2 Units of Measurement Chapter 2

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Density Sample #2 Chapter 2 Section 2 Units of Measurement

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pHet Simulation on Density Chapter 2 Section 2 Units of Measurement Do some calculation practice with density. Be sure to click on the link for “mystery”

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