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116问答网 > 一块冰浮在水面上，露出水面的体积是100cm3。已知冰的密度是0.9×103kg⼀m3求：这块冰有多重。

一块冰浮在水面上，露出水面的体积是100cm3。已知冰的密度是0.9×103kg⼀m3求：这块冰有多重。

2025-04-07 01:52:43

推荐回答（2个）

回答1：

设这块儿冰的体积为x cm3，冰的密度=0.9X103kg/m3=0.9g/cm3，水的密度=1.0g/cm3
冰块漂浮在水面上，所以冰块所受到的浮力等于冰块的重力
根据阿基米德原理，可知
1·x=0.9（x+100）
解得x=900
所以冰的质量=0.9X900=810g

回答2：

F浮=G d水gV排=mg d水V排=d冰V 1000(V-V露)=900V 100V=1000*100*10^(-6) V=1000*10^(-6) M=DV=0.9KG G=Mg=8.82N 所以这块冰重8.82牛

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