How does a school play a curical role in maintaining the neat and clean environment
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The main mechanisms of dry friction are adhesion, deformation of asperities (plowing), fracture and the so-called ratchet, and third-body mechanisms [30, 32, 63]. For each mechanism, we will identify the “small parameter” that is present because the forces at the interface are smaller than the forces in the bulk.
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in order to maintain cleanliness at school, students should make cleanliness monitoring committees consisting of some prefects in every class. They should not let any student throw litter either in the class or anywhere else in the school campus.
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