Density

• What is density a measure of?

  Density is a measure of how much mass a substance has per unit of its volume.
• How do you calculate density?

  Density is calculated by dividing mass by volume.
• What is the symbol for density in physics?

  The symbol for density is the Greek letter rho (ρ).
• In what units is density typically measured in physics?

  Density is typically measured in kilograms per meter cubed (kg/m³).
• What is the density of solid aluminum?

  The density of solid aluminum is 2710 kg/m³.
• How does the density of aluminum compare when measured in grams per centimeter cubed?

  The density of aluminum is 2.71 g/cm³ when measured in grams per centimeter cubed.
• How do you convert density from grams per centimeter cubed to kilograms per meter cubed?

  To convert, remember that 1 g/cm³ is equivalent to 1000 kg/m³.
• If you have 420 kg of aluminum with a density of 2710 kg/m³, what is the volume?

  The volume is calculated as $0.155 \text{ m}^3$.
• What is the first step in calculating the density of a solid experimentally?

  The first step is to find the mass of the solid.
• How do you find the volume of a regular solid?

  You find the volume by measuring and multiplying its length, width, and height.
• What is the volume of a cuboid with dimensions 4 cm, 3 cm, and 2 cm?


  The volume is $24 \text{ cm}^3$.
• How do you measure the volume of an irregular solid?

  You measure the volume using a eureka can and a measuring cylinder.
• What happens when you add a solid to a eureka can filled with water?

  A volume of water equal to that of the solid flows out into the measuring cylinder.
• How do you find the density of a liquid experimentally?

  You place an empty measuring cylinder on a balance, zero it, pour in the liquid, and then divide the mass by the volume.
• Why is it more accurate to measure larger volumes when calculating density?

  Larger volumes minimize the effects of uncertainty in measurements.
• What is the benefit of taking multiple measurements when calculating density?

  Taking multiple measurements helps identify anomalies and calculate a mean density.
• What are the steps to find the density of a solid experimentally?

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

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

  1. Calculate density using the formula: Density = Mass / Volume.
• What are the steps to find the density of a liquid experimentally?

  1. Place an empty measuring cylinder on a balance and zero it.
  2. Pour a known volume of liquid into the cylinder.
  3. Record the mass of the liquid.
  4. Calculate density using the formula: Density = Mass / Volume.