Question

Calculati masa unui cub din fier (Fe) cu latura de 1 centimetru (cm).

Answer 1

m = S * V
m - masa
S - densitatea
V - volumul
Vcub=l³
l=1cm
V=1cm³
S fier=$\frac{7860kg}{m^{3}} = \frac{7.86g \times 1000000}{1cm^{3} \times 1000000} = \frac{7.8g}{cm ^{3} }$
m= S * V = $\frac{7.8g}{cm^{3}} \times 1cm^{3} = 7.8g$