V₁ = 0.4 м³
m₂ = 714 кг
ρ₁ = 8900 кг/м³
ρ₂ = 7100 кг/м³
V₂ = m₂/ρ₂
m₁ = ρ₁V₁
ρ = m/V = (ρ₁V₁ + m₂)/(V₁ + m₂/ρ₂) = (8900*0.4 + 714)/(0.4 + 714/7100) = 4274/0.5 = 8548 кг/м³
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V₁ = 0.4 м³
m₂ = 714 кг
ρ₁ = 8900 кг/м³
ρ₂ = 7100 кг/м³
V₂ = m₂/ρ₂
m₁ = ρ₁V₁
ρ = m/V = (ρ₁V₁ + m₂)/(V₁ + m₂/ρ₂) = (8900*0.4 + 714)/(0.4 + 714/7100) = 4274/0.5 = 8548 кг/м³