# Density

Record the measurements needed to determine the densities of regular and irregular solid objects and liquids.

### To measure the density of various materials

#### Method 1: Regular solids

1. Use a ruler to measure the length (l), width (w) and height (h) of a steel cube.

2. Place the steel cube on the top pan balance and measure its mass.

3. Calculate the volume of the cube using (l × w × h).

4. Use the measurements to calculate the density of the metal.

5. Use vernier callipers to measure the diameter of the sphere.

6. Place the metal sphere on the top pan balance and measure its mass.

7. Calculate the volume of the sphere using 8. Use the measurements to calculate the density of the metal.

#### Method 2: Stone or other irregular shaped object

1. Place the stone on the top pan balance and measure its mass.

2. Fill the displacement can until the water is level with the bottom of the pipe.

3. Place a measuring cylinder under the pipe ready to collect the displaced water.

4. Carefully drop the stone into the can and wait until no more water runs into the cylinder.

5. Measure the volume of the displaced water.

6. Use the measurements to calculate the density of the stone.

#### Method 3: Water (or any liquid)

1. Place the measuring cylinder on the top pan balance and measure its mass.

2. Pour 50 cm3of water into the measuring cylinder and measure its new mass.

3. Subtract the mass in step 1 from the mass in step 2. This is the mass of 50 cm3of water.

4. Use the measurements to calculate the density of the water.