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求有关游标卡尺的物理问题用游标卡尺测物体是,卡尺的数值为什么会等于物体半径值的小数点后面的数值?就是下面那个卡尺测出的值.
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下面的游标尺共有10格,但每格只有0.9mm,总长为9mm,与主尺相差1mm,如果游标尺的第一格与主尺的第一格对齐,说明尺子只移动了0.1mm.（这是10格的）20格与主尺相差0.05mm,50格的与主尺相差0.02mm
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那是等于卡尺上面大的数字加上游标的读数
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