Question

V=0,0008m/cubi
g=10N/kg
G=8N. Ce densitate are corpul?

Answer 1

Notez:
ro-denistatea
m-masa
v-volumul
G-greutatea

$ro =\frac{m}{v}\\\\ G=m*g=\ \textgreater \ m= \frac{G}{g}\\\\ Inlocuim:\\\\ m= \frac{8N}{10 \frac{N}{kg} } =0,8kg\\\\ ro= \frac{m}{v}= \frac{0,8kg}{0,0008m^3}= \frac{ \frac{8}{10} }{ \frac{8}{10000} } = \frac{8}{10}: \frac{8}{10000}= \frac{8}{10}* \frac{10000}{8} = \frac{10000}{10}=1000 \frac{kg}{m^3}\\\\ \bold{ro=1000 \frac{kg}{m^3}}$