Explain why the surface of mortar and pestle (silbatta) used for grinding is etched again after prolonged use.

AcademicPhysicsNCERTClass 8

To make the surface of mortar and pestle rough again, they are etched as after prolonged use it losses its roughness and becomes very hard to grind anything. As a rough surface offer a larger force of friction than a smooth surface.

raja
Updated on 10-Oct-2022 13:29:12

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