Odpowiedź:
A)
[tex]2 \frac{g}{ {cm}^{3} } = 2 \times \frac{ \frac{1}{1000}kg}{ \frac{1}{1000000} {m}^{3} } = 2 \times \frac{1}{1000} kg \times \frac{1000000}{1} {m}^{3} = 2 \times 1000 \frac{kg}{ {m}^{3} } = 2000 \frac{kg}{ {m}^{3} } [/tex]
B)
[tex]3 \frac{kg}{ {m}^{3} } = 3 \times \frac{1000g}{1000000 {cm}^{3} } = 3 \times \frac{1g}{1000 {cm}^{3} } = 0.003 \frac{g}{ {cm}^{3} } [/tex]
