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.
On the right-hand side of (7), we see a ÃbuoyancyÃ term, which is the product of the perturbation density and the acceleration due to gravity. Now we assume that the fluid is incompressibl e, that is, r=r0 is a constant and. rÂ£=0. Water is nearly incompressible, and the name Ãshallow water equationsÃ comes.