When the figure is not level people cannot know what is meant by width, depth, or height without being told (or without labels), although length is generally still assumed to mean the direction in which the figure is longest..
Crude coal tar is a raw material which is further distilled to produce various carbon products, refined tars and oils used as essential components in the production of aluminum, rubber, concrete, plasticizers, coatings and specialty chemicals.oke is uses as a fuel and as a reducing agent in smelting iron ore in a blast furnace to manufacture steel and in foundry operations. Crude coal tar consists of a mixture of naturally occurring compounds containing hydrogen and carbon that are common to all organic fuels including coal, petroleum and wood.
Coal is a combustible rock and along with oil and natural gas it is one of the three most important fossil fuels. Coal has a wide range of uses; the most important use is for the generation of electricity. Coal forms from the accumulation of plant debris, usually in a swamp environment.When plant debris dies and falls into the swamp the standing water of the swamp protects it from decay. Swamp waters are usually deficient in oxygen, which would react with the plant debris and cause it to decay.oal is also used as a power source for factories. There it is used to heat steam and the steam is used to drive mechanical devices. A few decades ago most coal was used for space heating. Some coal is still used that way but other fuels and coal-produced electricity are now used instead.