Question

ce greutate are o cantitate de 1 L de apa?Dar o cantitate de 1 L de mercur?

Answer 1

$V_1=1 \ l=0,001 \ m^3 \\ V_2=1 \ l=0,001 \ m^3 \\ \rho_1=1 \ 000 \ kg /m^3 \\ \rho_2=13 \ 550 \ kg/m^3 \\g=10 \ N/kg\\ \boxed{G_1-?} \\ \boxed{G_2-?} \\ \bold{Rezolvare:} \\ \boxed{G=m \cdot g} \Rightarrow G_1=m_1 \cdot g; \ G_2=m_2 \cdot g \\ \boxed{\rho= \frac{m}{V} } \Rightarrow m_1=\rho_1 \cdot V_1; \ m_2=\rho_2 \cdot V_2 \\ m_1=0,001 \ m^3 \cdot 1 \ 000 kg/m^3=1 \ kg; \\ m_2=0,001 \ m^3 \cdot 13 \ 550 \ kg/m^3 =13,55 \ kg} \\ G_1=1 \ kg \cdot 10 \ N/kg \\ G_2=13,55 \ kg \cdot 10 \ N/kg$
$\Rightarrow \boxed{G_1=10 \ N} ; \\ \Rightarrow \boxed{G_2=135,5 \ N}$