explain the following term
rigidity
Compressibilty
kinetic energy
fluidity
Answers
Answer:
Rigidity: Rigidity is property shown by solids. It relates to tendency of solids to resist any change in their shape when an external force is applied. If enough force is applied solids may breaks but do not change their shapes, liquids are not at all rigid as they change their shape.
Compressibility: compressibility means reduction in the volume of a substance on applying pressure. Solids and liquid are incompressible. This is because there is very empty space between the particles of solids and liquids. For example, you cannot fill more petrol in your car petrol tank even if you apply pressure. On the other hand, gases are easily compressible on applying pressure. It is because there are large empty space between the particles of gases.
Kinetic energy: kinetic energy is also called energy of motion since particles of matter always remaining motion, they have kinetic energy.
In solids, the particles are bound to each other with strong inter particle forces of attraction, they have least kinetic energy. In liquid, the particles are less tightly bound to each other as the interparticles force of attraction is lesser then in case of solid particle. The K.E of solid particles and hence the particles of liquid of liquid can move more freely. In gases, the particle are bound by very weak forces of attraction. Gas particles can, therefore move almost freely and have a much higher value of kinetic energy. Also temperature increase, kinetic energy of particles of all kinds of matter increases.
Fluidity: fluidity is a property shown by liquids and gases. It means tendency to flow. Liquid and gases can change their shapes when a force is applied externally. This is the reverse of rigidity.