Density

• What is density a measure of?

  Mass per unit volume
• How do you calculate density?

  Divide mass by volume
• What is the symbol for density?

  The Greek letter rho
• In physics, how is density typically measured?

  Kilograms per meter cubed
• What is the density of solid aluminium?

  2,710 kilos per meter cubed
• How does the density of aluminium convert to grams per centimeter cubed?

  2.71 grams per centimeter cubed
• How do you calculate the volume of 420 kilos of aluminium?

  Divide mass by density
• What is the volume of 420 kilos of aluminium with density 2,710 kilos per meter cubed?

  0.155 meters cubed
• What are the steps to calculate density experimentally for solids?

  1. Measure the mass using a balance.
  2. Determine the volume:

  • For regular shapes: multiply length, width, height.
  • For irregular shapes: use a eureka can.

  1. Plug mass and volume into the density equation.
• How do you find the volume of a regular solid?

  Multiply its length, width, and height
• What is a eureka can used for?

  To measure the volume of irregular solids
• How does a eureka can measure volume?

  Water displaced equals the solid's volume
• What are the steps to calculate density experimentally for liquids?

  1. Zero the balance with an empty measuring cylinder.
  2. Pour a known volume of liquid (e.g., 10 mL).
  3. Record the mass of the liquid.
  4. Divide mass by volume to find density.
• Why is measuring a larger volume of liquid beneficial?

  It minimizes measurement uncertainty
• How can you improve the accuracy of density measurements?

  Take multiple measurements and calculate the mean
• What is the relationship between grams per centimeter cubed and kilos per meter cubed?

  1 gram/cm³ = 1,000 kilos/m³