一道简单初中物理题~帮忙解下

推荐回答

1.G=0.49+0.83=1.32N2.物体积=0.49N水的体积V=0.05dm^33.物体质量m=G/g=1.32/9.8=0.135kg物体密度p=m/V=0.135kg/0.05dm^3=2.7kg/dm^3=2.7*10^3/m^34.浮力=重力-测力计示数=1.32-0.932=0.388N浮力F=p'Vg此液体密度p'=F/Vg=0.388N/[(0.05dm^3)*9.8N/kg]=0.79kg/dm^3=0.79*10^3/m^3