铜块体积V
=m/p铜=mg/gp铜=G/gp铜=8.9N/[(10N/kg)*(8.9kg/dm^3)]=0.1dm^3
浮力F=排开的水的重力G'=p水*Vg=1kg/dm^3*(0.1dm^3)*(10N/kg)=1N
溢出的水的质量m'=m'g/g=G'/g=1N/(10N/kg)=0.1kg