1) F浮=G=ρ木V木g=600Kg/m×0.000125m×10N/Kg=0.75N 2) V排=0.5V木=0.5×125cm=62.5cm ρ盐=F浮/(V排g)=0.75N÷0.0000625m÷10N/Kg=1200Kg/m