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 used to separate a mixture. It usually involves removing the liquid portion of a substance while leaving behind the sediment. This process is used in a variety of instances. Red wine is a common example of a substance that is decanted. Wastewater may also be processed using this method.