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.
Archimedes' Principle The magnitude of the buoyant force on an object is equal to the weight of the fluid it displaces. B = ÏgVdisplaced. The factors that affect buoyancy areâ¦ the density of the fluid, the volume of the fluid displaced, and. the local acceleration due to gravity.