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.
12 Oct, 2009 Who discovered 1. Carbon is the fourth most abundant element in the universe by mass. It is also the second most abundant element in the human body after oxygen. But who discovered carbon? This post will answer that question and also tell you a few interesting facts about carbon. Who Discovered Carbon? Unfortunately, no one knows who discovered carbon. It is one of the few elements that was known since ancient times. The earliest use of carbon was sometime around 3750 BC. The Egyptians and Sumerians are jointly credited with the discovery as they were the first to use charcoal (a form of carbon) to obtain copper, tin and zinc from their ores.