1.密度=质量/体积=7.9N/10N/kg/100*10^-6m^3=7900kg/m^3
2.是铁
3.浮力=水密度x重力加速度x排开液体体积
=1000kg/m^3*10N/kg*100*10^-6m^3
=1N
4.读数=重力减浮力=7.9-1=6.9N
1.密度=质量/体积=7.9N/10N/kg/100*10^-6m^3=7900kg/m^3
2.是铁
3.浮力=水密度x重力加速度x排开液体体积
=1000kg/m^3*10N/kg*100*10^-6m^3
=1N
4.读数=重力减浮力=7.9-1=6.9N