Will a body weighing 140 kg, the volume of which is 0.20 m3, float in water? What substance is this body made of?

1. In order to determine the nature of the body of which it consists, it is necessary to determine its density. To do this, we divide the mass of this body by its volume:

ρ = M / V.

Substitute the values:

ρ = 140 / 0.2;

ρ = 700 (kg / m³).

This density corresponds to a material such as dry oak.

2. Now it is necessary to find out whether this body will be on the surface of the water or will sink. The first is possible if its density is less than that of water. Since the density of water is 1000 kg / m³, then we can conclude that this body will be on the surface of the water.

Answer: the presented body is made of dry oak and it will be on the surface of the water.