Question

Se da:
V=4 dm cubi
Ro =8900kg/m cubi
m=?


VA ROG !

Answer 1

Ro=m/V
deci, m=V*Ro

V=4dm^2=0,04m^2
Ro=8900kg/m^2

m=0,04m^2 * 8900kg/m^2=356kg

R-s: m=356kg

Answer 2

[tex]V=4 \ dm^3=0,004 \ m^3 \\ \rho=8 \ 900 \ kg/m^3 \\ \boxed{m-?} \\ \bold{Rezolvare:} \\ \boxed{\rho= \frac{m}{V} } \\ \Rightarrow m=\rho \cdot V \\ m=8 \ 900 \ kg/m^3 \cdot 0,004 \ m^3 \\ \Rightarrow \boxed{m=35,6 \ kg}.[/tex]