Density

A small cube of iron has sides with length 0.15 m. If the mass of the cube is 26.6 kg, what is its density?

• Aluminum

• Copper

• Magnesium

• Cobalt

A cuboid brick has a mass of 3.5 kg with side lengths of 23 cm,11 cm, and 7 cm. What is the density of the brick?

1. Two spheres have the same mass, but the second sphere has a volume half as big as the first. How much greater is the density of the second sphere than that of the first sphere?

• 2

• 3

• 4

• 5

• 2 mm

• 3 mm

• 4 mm

• 5 mm

• 2 : 1

• 1 : 2

• 4 : 1

• 1 : 4

• 0.23 Kg

• 117 Kg

• 2.63 Kg

• 17.55 Kg

An empty metal container has a mass of 5 kg. When it is filled with water, its mass becomes 30 kg, and when it is filled with oil, its mass becomes 23 kg. The relative density of oil is ……….

• 0.72

• 0.77

• 1.39

• 1.30