The density of the iron body is 7.8 g / cm, and the aluminum body is 2700 kg / m3. Which of the bodies has a higher density?

To compare the density of the iron body (ρ = 7.8 g / cm³) and the density of the aluminum body (ρ = 2700 kg / m³), we will convert the density of the iron body from non-systemic units of density measurement to system units in accordance with the international SI system: 7.8 g / cm³ (1 g = 10-³ kg, 1 cm³ = 10-6 m³) = 7.8 * 10-³ / 10-6 = 7800 kg / m³. 7800 kg / m³> 2700 kg / m³, therefore 7.8 g / cm³> 2700 kg / m³. Answer: The density is greater for the iron body.