Review #2 - Density Problems

Front

What is the formula for calculating density?

Back

Density (D) is calculated using the formula: D = mass (m) / volume (V).

Front

What are the units commonly used for density in the metric system?

Back

Common units for density in the metric system include grams per cubic centimeter (g/cm³) and grams per milliliter (g/mL).

Front

If an object has a mass of 100 g and occupies a volume of 50 cm³, what is its density?

Back

Density = mass/volume = 100 g / 50 cm³ = 2.0 g/cm³.

Front

How does the density of an object affect its buoyancy in a fluid?

Back

An object will float in a fluid if its density is less than the density of the fluid; it will sink if its density is greater.

Front

What is the density of water at 4°C?

Back

The density of water at 4°C is approximately 1.0 g/cm³.

Front

How do you convert density from g/cm³ to kg/m³?

Back

To convert from g/cm³ to kg/m³, multiply by 1000 (1 g/cm³ = 1000 kg/m³).

Front

What is the relationship between mass, volume, and density?

Back

Mass is directly proportional to density and volume; increasing mass while keeping volume constant increases density.

Front

What is the density of a substance with a mass of 200 g and a volume of 100 mL?

Back

Density = mass/volume = 200 g / 100 mL = 2.0 g/mL.

Front

If a rock has a density of 3.0 g/cm³, what can you infer about its composition compared to water?

Back

The rock is denser than water, indicating it will sink when placed in water.

Front

What is the significance of knowing the density of a material in practical applications?

Back

Knowing the density helps in identifying materials, calculating buoyancy, and determining material properties for engineering and construction.