Although most coals occur in stratified sedimentary deposits, the deposits may later be subjected to elevated temperatures and pressures caused by igneous intrusions or deformation during orogenesis (i.e., processes of mountain building), resulting in the development of anthracite and even graphite. Electrical energy is a type of potential energy, or energy stored in an object due to the position of the object. Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012. Information and translations of coal in the most comprehensive dictionary definitions resource on the web. As in European countries, the introduction of the steam locomotive gave the American coal industry a tremendous impetus. The biggest coal deposit by volume is the Powder River Basin in Wyoming and Montana, which the USGS estimated to have 1.07 trillion short tons of in-place coal resources, 162 billion short tons of recoverable coal resources, and 25 billion short tons of economic coal resources (also called reserves) in 2013. It may exist in potential, kinetic, thermal, electrical, chemical, nuclear, or various other forms. In addition, gasification and liquefaction of coal produce gaseous and liquid fuels that can be easily transported (e.g., by pipeline) and conveniently stored in tanks. Home / Science / Physics / Thermodynamics / What Is the Scientific Definition of Energy? But above all is she rich in mechanical power—water-power and coal. Energy cannot be created or destroyed. Energy assumes several forms; it may be thermal (in the form of heat), electrical, mechanical, chemical, radiant, or kinetic. “Have” vs. “Has”: When To Use Each One. References to the early uses of coal are meagre. Coal, one of the most important primary fossil fuels, a solid carbon-rich material that is usually brown or black and most often occurs in stratified sedimentary deposits. Coal liquefaction—that is, any process of turning coal into liquid products resembling crude oil—may be either direct or indirect (i.e., by using the gaseous products obtained by breaking down the chemical structure of coal). Potential energy. For a discussion of the coal-extraction process, see the article coal mining. Coal is formed when dead plant matter decays into peat and is converted into coal by the heat and pressure of deep burial over millions of years. (Definition of coal from the … Get exclusive access to content from our 1768 First Edition with your subscription. Of Taylor Swift's many famous boyfriends: "She has seen more shafts than a coal miner.". a black or dark-brown combustible mineral substance consisting of carbonized vegetable matter, used as a fuel. By the early 1830s mining companies had emerged along the Ohio, Illinois, and Mississippi rivers and in the Appalachian region. The energy of electric charge. Scope. Continued expansion of industrial activity in the United States and in Europe further promoted the use of coal. For this reason, any process used to convert coal to alternative fuels must add hydrogen (either directly or in the form of water). Published by Houghton Mifflin Harcourt Publishing Company. Coal is widely used as a fuel, and its combustion products are used as raw material for a variety of products including cement, asphalt, wallboard and plastics. A swinging pendulum has kinetic energy. Meaning of coal. Coal definition is - a piece of glowing carbon or charred wood : ember. Our editors will review what you’ve submitted and determine whether to revise the article. 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