The volume of a plastic covered sealed box is 350 cm³ and the box has a mass 500 g. Will the box float on water or sink in water? What will be the mass of water displaced by the box?

Condition for box to sink or float:

● If density of object is greater than that of water, object sinks.

● If density of object is lesser than that of water, object floats.

Given data:

Volume of box = 350 cm³

Mass of box = 500 g

Density of water = 1 g cm^-3

Density of box

= 1.43 g/cm³

Since the density of box is greater than that of water, box will sinks in water.

Density of displaced water

Volume of displaced water is equal to volume of box.

So, Density of displaced water

Or

Mass of displaced water = (Density of displaced watervolume of box)

Mass of displaced water = 1 g cm^-3350 cm³

= 350 g

Thus, the mass of displaced water is 350 g.