define rigidity??....
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Explanation:
Rigidity is defined as the property exhibited by the solid to change in its shape. That is when an external force is applied to the solid material, there won’t be any change in the shape. This shows that the particles are closely packed and the attraction between these particles are very strong.
Characteristics
It is the strongest force of attraction between particles.
This property makes the solid rigid.
Rigidity gives the perfect shape to solids, the particles in the solid are tightly packed.
Answer:
hardness
ex. The cell wall of the plant cell is RIGID due to the presence of Hemi -Cellulose and Pecton