Radio waves are electromagnetic waves and as such travel at the speed of light. Waves emitted a century ago would be 100 hundred light years away. A light year is the distance light travels in one year. In one year light travels about 5.9 trillion miles. therefore the waves traveled about 590 trillion miles in a century.
La unidad en que suele medirse la altura sobre el nivel del mar es el metro<span>. Se habla pues de </span>metros sobre el nivel del mar.
sedimentary is a example, indious is heat sedimentary is like layers and fossils and metamorphic is pressure
Some of the most typical characteristics of groundwater are weak turbidity, a constant temperature and chemical composition and almost overall absence of oxygen. Circulating groundwater can have extreme variation in the composition with the appearance of pollutants and various contaminants.
