F浮=G-G’ =29.4N-19.6N=9.8N
V排 = F浮/ ρ液g
= 9.8N/1.0×103kg/m3 × 9.8N/kg
= 1 ×10-3m3
ρ=G/gv=29.4N/9.8N/kgX1 ×10-3m3
=3×10³kg/m³