Question

Va rog ajutați ma dau 45 de puncte și coroana​

Answer 1

l=10 cm

V cub=l^3=(10 cm)^3=1000 cm^3

ρ=m/V=>m=ρ*V=2,7 g/cm^3*1000 cm^3=2700 g=2,7 kg

G=mg=2,7 kg*10 N/kg=27 N

Answer 2

$\it G=mg\ \ \ \ \ (1)\\ \\ \\m=\rho\cdot\mathcal{V}\ \ \ \ (2)\\ \\ \mathcal{V}=\ell^3=10^3=1000\ cm^3\ \ \ \ \ (3)\\ \\ (2),\ (3)\Rightarrow m=2,7\cdot1000=2700g=2,7kg\ \ \ \ \ (4)\\ \\ (1),\ (4 ) \Rightarrow G=2,7\cdot10=27\ N$