Required practical : Density

• How do you calculate the density of a regular shape?

  1. Calculate the volume of the object using a ruler and the equation Volume = length x breadth x height.
  2. Measure the mass using a top pan balance
  3. Use the equation Density = mass ÷ volume to find the density.
  4. Repeat and calculate a mean to reduce random errors
• How do you calculate the density of an irregular shape in an eureka can?

  1. Fill eureka can until the water reaches spout.
  2. Underneath the spout place a measuring cylinder
  3. Put the irregular shaped object into the water
  4. Collect the displaced water using the measuring cylinder and measure the volume
• How do you calculate the density of an irregular shaped object with a measuring cylinder?

  1. Fill measuring cylinder with water to 50ml
  2. Put in object
  3. Measure how much the water has risen
  4. Take 50 away from the risen value to get our volume Measure the mass using a top pan balance
  5. Use the equation Density = mass ÷ volume
  6. Repeat and calculate a mean to reduce random errors
• How do you calculate the density of a liquid?

  1. Place the measuring cylinder on a balance
  2. Zero the balance
  3. Pour 10ml of water (volume) into it and measure the mass
  4. Calculate the density
  5. Repeat adding 10 ml each time until it is full
  6. Calculate the mean of all density calculations
• How do u calculate density?

  Density = mass/Volume or P = M/V
• How do u calculate volume?


  volume = mass/density
• How do u calculate mass?


  Mass = density x volume
• The mass of an object is 10g, it has a volume of 3m3. Calculate

  it’s density in kg/m3?


  Density = Mass ÷ Volume

  ρ = m ÷ V

  ρ = (10 ÷ 1000) ÷ 300

  ρ = 0.01 ÷ 3

  ρ = 3.33x10-3 kg/m3
• How do u convert grams to kilograms?


  Divide by 1000
• What is the density of an object with a mass of 6kg and 3m(3)?


  Density = mass divided by volume

  6/3

  = 2g/kg
• What is the unit is density?


  kg/m3
• What is the unit for mass?


  Kg
• What is the units for volume?


  M3
• How can we measure mass?


  by using a top pan balance