Final answer:
An object with a density of 0.97g/ml will float in water because its density is less than water's density. The principle of buoyancy explains that an object less dense than the fluid it is in will float. For example, a human with a density of 995 kg/m³ will be mostly submerged in freshwater while slightly less in salt water due to the higher density of salt water.
Step-by-step explanation:
An object with a density of 0.97g/ml will float in water. This is because the object's density is less than that of water, which has a density of about 1.00 g/ml. According to the principle of buoyancy, an object will float if its density is lower than the density of the fluid it is placed in. Since the density of the given object is 0.97 g/ml, it is less dense than water, and it will experience a buoyant force greater than its own weight, resulting in the object floating.
When considering the average density of an object related to the density of water, it determines the object's ability to sink or float. For instance, if your body has a density of 995 kg/m³, which is less than the density of freshwater (1000 kg/m³), you will float with a fraction of your body submerged. The fraction submerged is the ratio of your density to the fluid's density. In freshwater, the fraction of your body that will be submerged is 995/1000, or approximately 99.5%. In salt water, with a higher density of 1027 kg/m³, a less fraction of your body will be submerged due to the increased buoyancy.