Question

The campresibality of substance is the resiptical of?? ​

Answer 1

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Answer 2

When we try to deform or compress an object a certain reduction in volume dV takes place.

If V is original volume, then strain=VdV.   Since strain is a ratio of two similar quantities, it has no unit.

When a force dFis applied to the surface to compress it, then the restoring force generated by the body becomes equal to the applied force, in equilibrium. If A is the surface area, then this is called as stress.

stress=AdF=dP  since force per unit area is pressure.

strainstress=K where K is known as Bulk Modulus of elasticity.

If stress is less, easier will it be to compress the object.

Hence compressibility=K1 

Thus compressibility is the reciprocal of Bulk Modulus.