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初中物理2015各地亮题汇编（45）--液体的压强(黑龙江省大庆市喇中)
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资料审核：czwlzx
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1、如图所示，A、B是两个完全相同的薄壁柱形金属容器，质量为0.5kg，底面积为0.01m2，容器高50cm，分别装有2.0×10﹣3m3的水和3.0×10﹣3m3的酒精，置于水平桌面上（ ρ酒精=0.8×103kg/m3，g=10N/kg）．求：（1）水的质量；（2）A容器对水平桌面的压强；（3）依据题意，下述情境是否有可能出现：当两个容器中的液体在增大同一深度△h后，容器中的液体对底部的压强能够达到p水＞p酒精？请说明理由． 答案 （1）2kg（2）2500Pa（3）不可能 解析 （1）水的密度，又知道水的体积根据密度计算公式可得（2）A容器对桌面的压强，根据固体压强计算公式，压力等于A容器的重力加水的重力即,带入压强公式。（3）容器中水的高度，酒精的高度根
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