Răspuns:
G=27N
Explicații și rezolvare:
[tex]\boxed{\bf V_{cub}=l \cdot l \cdot l=l^3} \\\bf l=latura[/tex]
[tex]\bf l=10 cm \Rightarrow V=l^3=(10cm) ^3=1000cm^3[/tex]
[tex]\boxed{\bf \rho=\dfrac{m}{V}} \Rightarrow m=\rho \cdot V\\\bf \rho=densitatea \: (\dfrac{g}{cm^3})\\\bf m=masa\: (g)\\\bf V=volumul \: (cm^3)[/tex]
[tex]\bf m=2,7\dfrac{g}{\sout{cm^3}} \cdot 1000 \sout{cm^3} = 2700g[/tex]
[tex]\boxed{\bf G=m\cdot g} \\\bf G=greutatea \: (N)\\\bf m=masa\:(kg)\\\bf g=acceleratia \: gravitationala \: (\approx 10\dfrac{N}{kg}) [/tex]
[tex]\bf m=2700g=2,7kg[/tex]
[tex]\bf G=2,7\sout{kg}\cdot 10\dfrac{N}{\sout{kg}}=27N[/tex]
Succes!
-Mihai
