The previous equation determines the average density of the object including any hollow parts containing trapped air, but the body density equation is designed to determine the average density of body...The previous equation determines the average density of the object including any hollow parts containing trapped air, but the body density equation is designed to determine the average density of body tissues only, not including trapped air. We now have an equation that allows us to calculate the density of an object by measuring only its weight and apparent weight, as long as we know the density of the fluid we are using.
