Give reason a piece of chalk wears out as it is used on a blackboard
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it is beacause of friction
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A piece of chalk wears out as it is used on a blackboard.
It is due to irregularities of the surface of board which causes friction.
Hope it helps uhh❤❤❤
It is due to irregularities of the surface of board which causes friction.
Hope it helps uhh❤❤❤
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