天气预报15天查询> 健康> 水的比重是多少

水的比重是多少

更新时间: 2021-05-26 23:06:22     

严格地说,应是水的重度,单位体积的质量------Kg/m3,它与温度相关,当水在4℃时的重度为1000Kg/m3,当温度上升时,重度要下降。比重是某种物质重度与水的重度之比,它没有单位,如钢的重度为7850Kg/m3,则与水的重度比为7.85,即说它的比重为7.85。自己与自己相比,当然是1。

关键词: 比重 多少

如有意见、反馈、侵权或投诉等情况,请联系:

电话:
邮箱:

我们将会在48小时内给与处理!

版权所有 Copyright ? 2009-2020 tianqiyubao3.com

页面:/news/view-3425638/ | 耗时:0.2182 s | 内存:1.89 MB | 查询:4 | 缓存读取:4 写入:0 | 加载文件:23
select * from tbl_Articles WHERE ArticleID=3425638 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=3425638 LIMIT 0,1
select * from tbl_Articles_sphinx where id=3425638 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(692223,2532327,1041349,1115285,3134322,583876,737836,2971240,1058250,1150177,1102084,1201288,884995,2148318,384569,3291378,2979620,2428666,1829668,1084723,535622,784187,1126424,363163,1112023,739521,1051729,740470,1102986,543890) ORDER BY field (ArticleID,692223,2532327,1041349,1115285,3134322,583876,737836,2971240,1058250,1150177,1102084,1201288,884995,2148318,384569,3291378,2979620,2428666,1829668,1084723,535622,784187,1126424,363163,1112023,739521,1051729,740470,1102986,543890)