Three characteristics that are unique to mammals include their  ability to feed their babies with milk made in their mammary  glands. Mammals also have hair on their bodies â¦and they have a  single bone that makes up their lower jaw.
buoyancy. n. 1. the ability to float in a liquid or to rise in a fluid. 2. (General Physics) the property of a fluid to exert an upward force (upthrust) on a body that is wholly or partly submerged in it. 3. the ability to recover quickly after setbacks; resilience.
The buoyant force is the weight of the displaced water. The volume of displaced water is, of course, the same as that of the body. Since the buoyant force is the weight of the water displaced by the object, then the buoyant force is the density of the water multiplied by the volume multiplied by g: .