Question

cum se rezolva problema: cutie
volumul=80 cm cub
densitatea=2,5/cm cub
afla: masa=? {kg}

Answer 1

$V=80 \ cm^3=0,000 \ 08 \ m^3 \\ \rho=2,5 \ g/cm^3=2 \ 500 \ kg/m^3 \\ \boxed{m-?} \\ \bold{Rezolvare:} \\ \boxed{\rho= \frac{m}{V} } \\ \Rightarrow m=\rho \cdot V \\ m=2 \ 500 \ kg/m^3 \cdot 0,000 \ 08 \ m^3 \\ \Rightarrow \boxed{m=0,2 \ kg}$