1)ρ=m/V=(13.0g-10.8g)/(7.8-5.8)cm3=1.1g/cm3
2)m水=ρV=1.1 g/cm3×5.8cm3=6.38g
M容器=10.8g-6.38g=4.42g
3)m水=ρV=1.1 g/cm3×10cm3=11g
M总=11g+4.42g=15.42g
1)ρ=m/V=(13.0g-10.8g)/(7.8-5.8)cm3=1.1g/cm3
2)m水=ρV=1.1 g/cm3×5.8cm3=6.38g
M容器=10.8g-6.38g=4.42g
3)m水=ρV=1.1 g/cm3×10cm3=11g
M总=11g+4.42g=15.42g