Density Flashcards

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Questions and Answers

What is mass density?

  • The mass of a substance.
  • The volume of a substance divided by its mass.
  • The mass of a quantity of a substance divided by the volume it occupies. (correct)
  • The mass per unit volume of a substance. (correct)

What is the formula for mass density?

D = mass/volume

What are the metric units for density?

kg/m^3

Density is a measure of concentration of _____

<p>mass</p> Signup and view all the answers

What is weight density?

<p>The weight per unit volume of a substance.</p> Signup and view all the answers

What is the formula for weight density?

<p>weight/volume</p> Signup and view all the answers

What are the units for weight density?

<p>N/m^3</p> Signup and view all the answers

What is specific gravity?

<p>The ratio of a substance's density to the density of water.</p> Signup and view all the answers

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Study Notes

Mass Density

  • Defined as mass per unit volume, indicating how much matter is contained in a given space.
  • Calculated using the formula: D = mass/volume.
  • Measured in metric units as kilograms per cubic meter (kg/m³).

Density Notation

  • Density is represented by the capital letter "D."

Practical Example

  • To calculate the mass density of water, utilize the mass of water in an aquarium, which is specified as 250 kg, alongside the aquarium's volume.

Weight Density

  • Refers to the weight per unit volume of a substance, calculated as weight/volume.
  • Different from mass density as it incorporates gravitational effects.
  • Measured in newtons per cubic meter (N/m³).

Specific Gravity

  • Represents the ratio of a substance's density compared to the density of water, providing a dimensionless value for easy comparison.

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