Comment upon the following: rigidity, compressibility, fluidity, filling a gas container, shape, kinetic energy and density.
Rigidity→ The property of matter to maintain its shape when external forces are applied to it is known as rigidity. Solids have this property. Compressibility → The property of matter to allow compression when high pressure is applied to it is known as compressibility. Some Liquids and all gases have this property. Fluidity → The property of matter to flow and change in its shape when external forces are applied to it is known as fluidity. Both liquids and gases have this property. Filling a gas container → Gases are fluid in nature and are highly compressible which allows them to be filled within a vessel at high pressure. A large volume of gas can be filled in a container of less volume making it suitable and more cost efficient for transportation. Shape→ Only solid objects have well defined shape while liquids can acquire any shape depending on the container they are kept in and gases don’t have any shape. Kinetic energy → The particles of a matter are continuously in motion and thus have kinetic energy. As the particles in solids have the least movements, the kinetic energy of solids is the least. The particles of gases have the freest movements and hence they have the highest kinetic energy. The order of kinetic energies for different type of matters is: solid < liquid < gas Density → Density of any substance can be explained as Mass per unit volume i.e. density = mass/volume.
