Question

Deterinati Volumul , masa si Greautatea unui cub cu latura de 1 cm stiind ca densitatea=2700 kg\metri cub
acceleratie gravitationala=10Newton\kg
P.s sa fie in tabel..!

Answer 1

l=1 cm--->l=0,01 m
p=2700kg/m³
g=10N/kg
V=?
m=?
G=?
V=l³=(0,01)³=0,000001 m³
V=0,000001 m³
m=?
p=m/V =>m=p*V
m=2700kg/m³*0,000001m³=0,0027 kg
m=0,0027kg
G=m*g
G=0,0027kg*10N/kg=0,027 N
G=0,027N

Answer 2

$l=1 \ cm=0,01 \ m \\ \rho=2 \ 700 \ kg/m^3 \\ g=10 \ N/kg \\ \boxed{V-?} \\ \boxed{m-?} \\ \boxed{G-?} \\ \bold{Rezolvare:} \\ \boxed{\rho= \frac{m}{V} } \ \Rightarrow V= \frac{m}{\rho} \ \Rightarrow m=\rho \cdot V\\ \boxed{G=m \cdot g} \\ V=l^3 \\ V=(0,01 \ m)^3 \\ \Rightarrow\boxed{V=0,000 \ 001 \ m^3} \\ m=2 \ 700 \ kg/m^3\cdot 0,000 \ 001 \ m^3 \\ \Rightarrow \boxed{m=0,0027 \ kg} \\ G=0,0027 \ kg \cdot 10 \ N/kg \\ \Rightarrow \boxed{G=0,027 \ N}$