Question

define rigidity and mass unit
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Answer 1

RIGIDITY- It is a property in which a substance cannot change its Shape by hammering or due to any external force acts. 

The basic SI unit of mass is the kilogram (kg). In physics, mass is not the same as weight, even though mass is often determined by measuring the object's weight using a spring scale, rather than balance scale comparing it directly with known masses.

Answer 2

Answer:

RIGIDITY- It is a property in which a substance cannot change its Shape by hammering or due to any external force acts. 

The basic SI unit of mass is the kilogram (kg). In physics, mass is not the same as weight, even though mass is often determined by measuring the object's weight using a spring scale, rather than balance scale comparing it directly with known masses.