(达州专版)2019中考物理阶段测评:力学综合测试一复习课件.ppt

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阶段测评:力学综合测试题(一),时间:60分钟 分值:85分,B,A,B,C,C,B,A,C,A,C,0,0.4,850,80%,3 000,80%,100,不变,减小,机械能转化为内能,500,不变,不可再生,内,910,120,62.5,0.6,1.8,75%,3.535104,窗外的空气流速大、压强小;飞机,内的空气流速小、压强大,飞机内的气压大于飞机外的气压,二力平衡,0.6,0.6,在接触面粗糙程度相同时,,压力越大,滑动摩擦力越大,在压力相同时,,等于,水平向右,接触面越粗糙,滑动摩擦力越大,27.0,10,2.7,偏小,将金属块挂在弹簧测力计下方浸没于盐水中,读出测力计的,示数F,

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