What is the equation for Density? Note table 5.1. Which has a higher density, fresh water or sea water at 4 degrees Celsius? Why? Which has a higher density Mercury or Iron? Would an iron ball float in mercury? What is the density of air at 10 Celsius? _________________ Note the units are in kg/m3. How does this compare to water? The density of a human body is about 1.03 g/cm3 (1030 kg/m3), close to water