Physical Science Density Practice Problems PDF
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This document provides practice problems relating to density, including examples for tin, a liquid, and wood. It also includes calculations for determining the mass and volume of other materials such as pine, metal, and water.
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LT 3 AND 4 lt4.pdf lt3.pdf Physical Science Density Practice Problems (lt4.pdf) Key Concepts: Density Formula: D=Vm D=mV Where ( D ) is density, ( m ) is mass, and ( V ) is vol...
LT 3 AND 4 lt4.pdf lt3.pdf Physical Science Density Practice Problems (lt4.pdf) Key Concepts: Density Formula: D=Vm D=mV Where ( D ) is density, ( m ) is mass, and ( V ) is volume. Units: Density is typically expressed in g/cm³ or g/mL. Practice Problems: Density of Tin: Mass = 16.52 g, Volume = 2.26 cm³ Density = 2.26cm316.52g=7.31g/cm3 16.52 g2.26 cm3=7.31 g/cm3 Density of a Liquid: Mass = 163 g, Volume = 50.0 cm³ Density = 50.0cm3163g=3.26g/cm3 163 g50.0 cm3=3.26 g/cm3 Density of Wood: Mass = 25 g, Volume = 35 cm³ LT 3 AND 4 1 Density = 35cm325g=0.71g/cm3 (likely not oak) 25 g35 cm3=0.71 g/cm3 Mass of Pine: Volume = 800 cm³, Density = 0.5 g/cm³ Mass = 0.5g/cm3×800cm3=400g 0.5 g/cm3×800 cm3=400 g Volume of Metal: Mass = 325 g, Density = 9.0 g/cm³ Volume = 9.0g/cm3325g=36.11cm3 325 g9.0 g/cm3=36.11 cm3 Mass of Water: Volume = 100 cm x 50 cm x 30 cm = 150,000 cm³ Mass = 150,000 g (since density of water = 1 g/cm³) Volume Displacement: Initial water level = 40.0 mL, Final = 63.4 mL Volume of copper = 63.4 mL - 40.0 mL = 23.4 mL Density of copper = 8.9 g/cm³, Mass = 8.9g/cm3×23.4cm3=208.26g 8.9 g/cm3×23.4 cm3=208.26 g Density of a Substance: Mass = 0.36 g, Volume = 2500 cm³ Density = 2500cm30.36g=0.000144g/cm3 0.36 g2500 cm3=0.000144 g/cm3 Mass of Water: Volume = 75 mL Mass = 75 g (density of water = 1 g/mL) LT 3 AND 4 2 Understanding Accuracy and Precision in Scientific Measurement (lt3.pdf) Key Concepts: Accuracy: How close a measurement is to the true value. Precision: How close measurements are to each other, regardless of their closeness to the true value. Examples: Golf Analogy: Accurate shots land in the hole; precise shots land close together but not necessarily in the hole. Measurement Techniques: Measuring Length: Use a metric ruler; read in millimeters (mm) and centimeters (cm). Measuring Mass: Use a balance (triple beam or electronic) for accurate mass readings. Measuring Volume: Use a graduated cylinder; read the meniscus for accurate liquid volume. Systems of Measurement: SI Units: Standardized units used in scientific measurements (e.g., meter for length, kilogram for mass). Unit Conversions: Examples of converting between SI and English units, emphasizing the importance of using a consistent measurement system. LT 3 AND 4 3
