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a=6cm=0,06m
m=0,85kg
Szuk. ρ=?
Roz.
ρ=m/V
V=a³
ρ=m/a³
ρ=0,85kg/(0,06m)³
ρ=3935,19kg/m³
Masa (m)= 0,85kg= 850g
Objętość (v)=6^3=216cm^3
Gęstość=3,935g/cm^3