The term âcatapultâ is used to define a very wide variety of large machines for hurling projectiles and some of the more common variations include the trebuchet, which is a catapult that uses gravity and a seesaw effect to hurl its projectile.
A demyelinating disease is any condition that results in damage to the protective covering (myelin sheath) that surrounds nerve fibers in your brain and spinal cord.
Decantation is a process for the separation of mixtures, by removing a layer of liquid, generally one from which a precipitate has settled.The purpose may be either to produce a clean decant, or to remove undesired liquid from the precipitate (or other layers).ecantation is a process for the separation of mixtures, by removing a layer of liquid, generally one from which a precipitate has settled.