The primary use of coal is as a source of energy. Nations around the world use coal to produce electricity. Steel manufacturers also use coal to create a fuel called coke. Coal is formed from plants that were buried in the earth millions of years ago.Know More
Coal is an important energy resource, but is not renewable. It is an exhaustible resource, which means that the supply is finite. Another significant problem with coal as a fuel is that it pollutes the atmosphere. Using coal produces large amounts of greenhouse gases. The fuel from coal is burned at power plants to heat water. The heated water creates steam that powers a large turbine. The turbine then produces electricity.
Experts divide coal into four main classifications. These are lignite, subbituminous, bituminous and anthracite. These four types of coal have various levels of energy content. Anthracite coal has the highest energy content and is therefore the most valuable of the four groups. Bituminous coal is the most common type of coal in the United States. Over half of the coal reserves in the country contain bituminous coal. Anthracite coal is much less common, with less that 2 percent of the coal reserves in the nation being of this variety.Learn more about Industries
A pilot test or pilot study is used to conduct preliminary analysis before going ahead with a full-blown research study or experiment. It is essentially a test run or rehearsal of the main experiment or study.Full Answer >
Niobium is used as an alloying agent in carbon and alloy steels and in non-ferrous metals. It is also used in jet engines and rockets. This element has superconductive properties and is used in superconductive magnets. This type of application could be used for the large-scale generation of electricity. It is frequently used in jewelry and has been tested for use in some medical implants.Full Answer >
Chemicals used in fracking include methanol, BTEX compounds, diesel fuel, lead and hydrogen fluoride. In 2011, a congressional report revealed that an estimated 10 million gallons of hazardous chemicals had been used by hydraulic fracturing companies.Full Answer >
Alloys are used because they are often harder than pure metal. Making alloys usually involves mixing one harder element with a metal to create a stronger item.Full Answer >