Question

Define rigidity, compressibility,density and fluidity

Answer 1

Rigidity : It is the state in which the particles of a substance are fixed in their positions.

Compressibility : It is a property by which the volume of a sunstance can be reduced, or a substance can be made compact, by pressing it.

Density : It is the the packing of the constituent particles, in a given volume of the substance. It can also be referred to as thickness of the substance.

Fluidity : It is the property by virtue of which, the particles of a molecule move in space. A substance whose particles can move easily is said to be fluid, for example, liquid.


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Answer 2

rigidity refers to the property of a solid to resist change in its shape . when an outside force is applied . in most simple term , rigidity means stiffness. the particle in a solid are very closely packed and there are very strong forces of attraction between them, so solids possess high rigidity.

compressibility is the property of a fluid due to which its volume decreases when pressure is applied . the particles in gases have large spaces between them due to which their volume decreases too much when pressure is applied on them.

the property of flowing easily is called fluidity. gases and liquid exhibit the property of fluidity , so they are called fluids.