1.4000kg/m3=................gr/cm3 2.2,5gr/cm3=...................kg/m3

1. 4000 ÷ 1000 = 4 g/cm3
2. 2,5 × 1000 = 2500 kg/m3

1) 4000 kg/m^3 = 4000000 gr/1000000 cm^3
= 4 gr/cm^3

2) 2,5 gr/cm^3 = 2,5 × 10^(-3) kg/10^(-6) m^3
= 2,5 × 10^3 kg/m^3 = 2500 kg/m^3