How do air parcels respond to a horizontal air pressure gradient? A horizontal pressure gradient refers to air pressure changes along a surface of constant altitude. The horizontal wind is governed by interactions of the pressure gradient force, centripetal force, Coriolis Effect, friction, and gravity. The pressure gradient force initiates air motion and arises in part from spatial variations in air temperature and, to a lesser extent, water vapor concentration.
Carbon fiber was invented in 1958 by Roger Bacon. It used Rayon  fibers which where heated until carbonized to create a highly  durable and strong material.
The raw material used to make carbon fiber is called the precursor. About 90% of the carbon fibers produced are made from polyacrylonitrile (PAN).The remaining 10% are made from rayon or petroleum pitch.All of these materials are organic polymers, characterized by long strings of molecules bound together by carbon atoms.he raw material used to make carbon fiber is called the precursor. About 90% of the carbon fibers produced are made from polyacrylonitrile (PAN).