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 vertical component of force on any area is equal to the weight of. that volume of fluid that would extend vertically from the area to the free. surface. As a result of this, the buoyant force on any object is equal to the. weight of the water displaced. The total resultant force is.