(达州专版)2019中考物理第四单元密度压强浮力第10课时质量密度复习课件.ppt

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第四单元 密度 压强 浮力,学生用书P37,第10课时 质量 密度,物质,托盘天平,水平台上,零刻度处,左,右,游码,特性,无关,不变,变小,学生用书P38,B,零刻度线,右,74.4,D,0.2,72.2,40,1.125103 kg/m3,偏大,零,右,平衡螺母,镊子,150.6,1.37,学生用书P39,D,D,B,A,C,不变,变大,变小,向右移动游码,平衡,60,1.05,偏大,烧杯中盐水倒入量筒中,时会有残留,造成测得的体积偏小,所以密度偏大,左,40,0.93103,大,20,7.9103,偏大,右,右,1.224103,大,30,3,2.5 kg/m3,8 kg,0.8103 kg/m3,大于,小于,121,45,1.5103,硬塑料,

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