What is the density of a substance of mass 100 g and volume 10 cm³?

The density of gold is 19 g/cm³. Find the volume of 95 g of gold.

What is the mass of 5 m³ of cement of density 3000 kg/m³?

Why does a block of wood held under water rise to the surface when released?

The density of a body is 800 kg/m³. Will sink or float when dipped in a bucket of water? (Density of water = 1000 kg/m³).