Question

un cub din lemn are densitatea de 2500kg/mcubi si are latura de 2 cm. aflați greutatea​

Answer 1

$v = 2 \times 2 \times 2 = 8 {cm}^{3} = \frac{8}{ {10}^{6} } {m}^{3}$

$2500 = \frac{g}{v}$

$2500 = \frac{g}{ \frac{8}{ {10}^{6} } }$

$g = 2500 \times \frac{8}{ {10}^{6} } = \frac{20000}{1000000} = \frac{2}{100} = 0.02kg = 20g$