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水和牛奶哪个重
更新时间: 2020-10-11 00:00:00  

同体积的水和牛奶,牛奶重,原因为:

1、常温常压下,水的比重为1,比重也称相对密度,固体和液体的比重是该物质的密度与在标准大气压,3.98摄氏度时纯水的密度为999.972千克每立方米,纯水在3.98摄氏度时密度最大;

2、温度为4摄氏度时,水的密度近似为999.972千克每立方米,所以,比重为1;

3、温度高于4摄氏度时,由于水的体积膨胀,密度变小,所以比重小于1;

4、温度低于4摄氏度时,水的体积也膨胀,密度也变小,所以比重也小于1;

5、正常牛乳在20摄氏度时,比重为1.028到1.033之间;

6、所以在同体积同温度的情况下,牛奶比水重。

关键词: 牛奶 哪个

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