φ=0,8 (80%) ρн=10 г/м3 V=50 м3 ρ=? m=?
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φ=ρ/ρн
ρ=φ*ρн=0,8*10=8 г/м3
m=ρ*V=8*50=400 г (0,4 кг)
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φ=0,8 (80%) ρн=10 г/м3 V=50 м3 ρ=? m=?
===
φ=ρ/ρн
ρ=φ*ρн=0,8*10=8 г/м3
m=ρ*V=8*50=400 г (0,4 кг)
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