CORROSIÓN Corrosión es el ataque destructivo de un metal por reacción química o electroquímica con su medio ambiente” Es la transformación indeseable de un material como consecuencia del medio que lo rodea” Ejemplos cotidianos de corrosión: Las cañerías de agua El automóvil El lavarropas La corrosión de envases metálicos para conservas Agentes agresivos que producen la corrosión: La atmósfera El agua de mar El aire húmedo Los vapores ácidos La corrosión: un problema económico y de seguridad. Se extiende a todos los materiales y siendo una problemática ambiental que se tiene que mejorar ya. Contesta: 1. ¿Cuál es la idea principal del texto? 2. Qué relación presenta esta problemática con la formación de óxidos. 3. Escribe tu punto de vista sobre esta problemática y como podíamos solucionarla. 4. Investiga que realiza Colombia para mejorar esta problemática

shield volcanos are angry and get mad over the smallest things so much that there heads erupt   pahoehoe and a'a lava. a composite volcano is the poller opposite of a shield volcano. its   peaceful thing and knows how to control its emotions.      

most historians agree that gabriel mouton, the vicar of st. paul’s church in lyons, france, is the “founding father” of the metric system. he proposed a decimal system of measurement in 1670. mouton based it on the length of one minute of arc of a great circle of the earth (now called a nautical mile, 1852 meters). he also proposed the swing-length of a pendulum with a frequency of one beat per second as the unit of length (about 25 cm). a pendulum beating with this length would have been fairly easy to produce, thus facilitating the widespread distribution of uniform standards. over the years, his work was revised, improved, and extended by a number of french scientists.

the political sponsor of weights and measures reform in the french revolutionary national assembly was the bishop of autun, better known as talleyrand. under his auspices, the french academy appointed several committees to carry out the work of developing a usable system of weights and measures for france. one of the committees recommended a decimalized measurement system based upon a length equal to one ten-millionth of the length of a quadrant of the earth’s meridian (i.e., one ten-millionth of the distance between the equator and the north pole).