水立方外层2.4mm,该膜质量0.24kg,密度?
问题描述:
水立方外层2.4mm,该膜质量0.24kg,密度?
答
V=1m²*0.0024m=0.0024m³
ρ=m/V=0.24kg/0.0024m³=100kg/m³