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?

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

  2,710 kilos per meter cubed
• How much mass does a one meter cube of aluminium have?

  2,710 kilos
• How can density be measured in other units?

  Using grams per centimeter cubed
• What is the conversion factor between grams per centimeter cubed and kilos per meter cubed?

  1 gram per centimeter cubed equals 1,000 kilos per meter 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 a density of 2,710 kilos per meter cubed?

  $0.155 \text{ m}^3$
• What are the steps to calculate the density of a solid experimentally?

  • Find the mass using a balance
  • Determine the volume based on shape:
  • Regular: Measure and multiply dimensions
  • Irregular: Use a eureka can
  • Plug values into the density equation
• How do you find the volume of a regular solid?

  Multiply length, width, and height
• How do you find the volume of an irregular solid?

  Use a eureka can
• What is the purpose of the outlet on a eureka can?

  To collect displaced water
• How do you calculate the density of a liquid?

  Divide mass by volume
• What is the first step in measuring the density of a liquid?

  Zero the balance with an empty cylinder
• What volume is equivalent to 10 milliliters?

  10 centimeters cubed
• Why is measuring a larger volume more accurate?

  It minimizes measurement uncertainty
• What are the methods to improve density measurement accuracy?

  • Measure larger volumes
  • Take multiple measurements
  • Identify anomalies
  • Calculate the mean