Density 2

What apparatus is needed to determine the density of a regularly-shaped block?

• a balance and a ruler

• a balance and a forcemeter (spring balance)

• a measuring cylinder and a ruler

• a measuring cylinder and a beaker

Which of the following is a unit of density?

• cm³ / g

• g / cm²

• g / cm³

• kg/m²

The diagram shows some liquid in a measuring cylinder. The mass of the liquid is 16 g. What is the density of the liquid?

• 320 g /cm³

• 36 g /cm³

• 1.25 g /cm³

• 0.8 g /cm³

The masses of a measuring cylinder before and after pouring some liquid into it are shown in the diagram. What is the density of the liquid?

• (120/100) g/cm³

• (100/140) g/cm³

• (180/120) g/cm³

• (180/140) g/cm³

A student pours liquid into a measuring cylinder. The student records the volume of the liquid from the scale on the measuring cylinder. He then puts the measuring cylinder containing the liquid on a balance and records the mass.

What else needs to be measured before the density of the liquid can be calculated?

• the depth of the liquid in the measuring cylinder

• the mass of the empty measuring cylinder

• the temperature of the liquid in the measuring cylinder

• the volume of the empty measuring cylinder

A metal drum has a mass of 200 kg when empty and 1000 kg when filled with 1.0 m³ of methylated spirit.

What is the density of methylated spirit?

• 0.0050 kg /m³

• 0.11 kg /m³

• 800 kg /m³

• 1000 kg /m³

Two blocks are joined together. One block has a density of 6.0 g/cm³ and the other has a density of 9.0 g/cm³.

What is the overall density of the two blocks joined together?

• 7.0 g /cm³

• 7.5 g /cm³

• 8.0 g /cm³

• 15 g /cm³

During an experiment to find the density of a stone, the stone is lowered into a measuring cylinder partly filled with water. Which statement is correct?

• The difference between the readings gives the density of the stone.

• The difference between the readings gives the volume of the stone.

• The final reading gives the density of the stone.

• The final reading gives the volume of the stone.

A box has an internal volume of 1000 cm³. When a solid object is placed in the closed box, the volume of air in the box is 520 cm³.

The density of the object is 8.00 g /cm³.

What is the mass of the object?

• 60 g

• 3840 g

• 4160 g

• 8000 g

Which items of apparatus are required to determine the density of a liquid?

• balance and measuring cylinder

• balance and thermometer

• metre rule and measuring cylinder

• metre rule and thermometer