九年级物理书第十一章第五节密度与社会课后试题解析
1 2 3 4 题 救命啊
人气：489 ℃ 时间：2020-03-20 03:12:02
解答
第一题 m=pv=0.9乘103kg/m3乘1乘10-6m3=0.9乘10-3kg
v=m/p=0.9乘10-3kg/1乘103kg/m3=0.9m3
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