Răspuns :
[tex]V=20 \ dm^3 =0,02 \ m^3 \\ \rho=500 \ g/dm^3=500 \ kg/m^3 \\ \boxed{m-?} \\ \bold{Rezolvare:} \\ \boxed{\rho=\frac{m}{V}} \\ \Rightarrow m=\rho \cdot V \\ m=0,02 \ m^3 \cdot 500 \ kg/m^3 \\ \Rightarrow \boxed{m=10 \ kg}[/tex]
ρ=m/V=>m=ρ•V.Intai trb sa efectuam transformarile:20 dm cubi=20:10 la a 3-a m cubi=0,02m cubi.____500g/dm cubi=500:1000kg/1000m cubi=500:1kg/m cub=500kg/m cub.__________________________Acum rezolvam:m=ρ•V=500•0,02=5•100•0,02=5•2=10kg(de pamant)