After using the yum install command, you will be prompted for the computer's root password. Type in the root password and press 'Enter'. You will not see the password as you type. The terminal will start giving information about the application, and end with Is this ok [y/N]:.
While some of the compounds in the dirt and rock are the same in most coal, the carbon is combined here and there with hydrogen, oxygen, sulphur, nitrogen, phosporus and just about every other common element in small quantities. Imagine an extremely large net where the knots are carbon atoms.
Coal: Coal is fossilized plant material, and varies greatly in itâs properties. There are four main types. Antracite is âhard coalâ has 86-98% carbon content and has 13-15 thousand BTUâs per pound. Bituminous is âsoft coalâ has 45-86% carbon content and 10-15 thousand BTUâs per pound. Sub-bituminous has about 35-45% carbon content and 8-13 thousand BTUâs per pound, and generally lower sulfur content. Lignite is âbrown coalâ geologically speaking, with a low 25-35% carbon content, and between 4 and 8 thousand BTUâs per pound.