People also ask
What type of rock is coal?
Coal is a black or brownish-black sedimentary rock that can be burned for fuel and used to generate electricity. It is composed mostly of carbon and hydrocarbon s, which contain energy that can be released through combust ion (burning).
What is the reflectivity of coal?
An important property of coal is its reflectivity (or reflectance )鈥攊.e., its ability to reflect light. Reflectivity is measured by shining a beam of monochromatic light (with a wavelength of 546 nanometres) on a polished surface of the vitrinite macerals in a coal sample and measuring the percentage of the light reflected with a photometer.
What are the main components of coal?
It is composed mostly of carbon and hydrocarbon s, which contain energy that can be released through combust ion (burning). Coal is the largest source of energy for generating electricity in the world, and the most abundant fossil fuel in the United States.
What is low coal?
low rank of coal, mainly used to generate electricity in power plants. sinking or lowering of the Earth’s surface, either by natural or man-made processes.