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In the milling method, which mechanical force can be applied to two material particles to create a rubbing action that turns them into powder?
Question

In the milling method, which mechanical force can be applied to two material particles to create a rubbing action that turns them into powder?

A.

Impact

B.

Shear

C.

Attrition

D.

Compression

Correct option is C

In the milling method, the mechanical force applied to two material particles to create a rubbing action that turns them into powder is attrition. Attrition involves frictional or rubbing forces between particles or between a particle and a surface, gradually reducing particle size into fine powder.
Impact involves striking, shear involves sliding layers, and compression involves pressing, but the rubbing action specific to milling is attributed to attrition.

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