tag:blogger.com,1999:blog-25817669786302530232011-07-07T20:49:14.199-07:00Marta Orihuelhttp://www.blogger.com/profile/08837559117293592813noreply@blogger.comBlogger61100tag:blogger.com,1999:blog-2581766978630253023.post-62743127422936947332009-12-01T15:06:00.000-08:002009-12-09T12:36:11.899-08:00En el año 1940, en Washington, el puente de Tacoma Narrows fue destruido por vientos que no eran demasiado fuertes. De hecho, la estructura había soportado, anteriormente al desastre, vendavales más intensos. El puente se desplomó por el fenómeno de la resonancia: cuando la frecuencia con que actúa una fuerza externa coincide con la frecuencia natural del oscilador ambas frecuencias se acoplan y las vibraciones aumentan fuertemente su amplitud. En el caso del puente de Tacoma Narrows el viento que sopló a través de la estructura originó turbulencias que ocurrieron a una frecuencia igual a la frecuencia natural del puente lo que hizo que entrara en resonancia, aumentando excesivamente la amplitud de las oscilaciones y provocando su destrucción.<br /><object width="350" height="315"><param name="movie" value="http://www.youtube.com/v/j-zczJXSxnw&hl=es_ES&fs=1&"></param><param name="allowFullScreen" value="true"></param><param name="allowscriptaccess" value="always"></param><embed src="http://www.youtube.com/v/j-zczJXSxnw&hl=es_ES&fs=1&" type="application/x-shockwave-flash" allowscriptaccess="always" allowfullscreen="true" width="350" height="315"></embed></object><strong></strong><div class="blogger-post-footer"><img width='1' height='1' src='https://blogger.googleusercontent.com/tracker/2581766978630253023-6274312742293694733?l=blogmartaorihuel.blogspot.com' alt='' /></div>Marta Orihuelhttp://www.blogger.com/profile/08837559117293592813noreply@blogger.comtag:blogger.com,1999:blog-2581766978630253023.post-46148345634850388532009-11-19T15:08:00.001-08:002009-11-28T13:35:09.232-08:00<a title="View Origen de los elementos y de la tabla Periodica on Scribd" href="http://www.scribd.com/doc/8344633/Origen-de-los-elementos-y-de-la-tabla-Periodica" style="margin: 12px auto 6px auto; 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margin:0 10px 10px 0;cursor:pointer; cursor:hand;width: 400px; height: 295px;" src="http://www.rmm.cl/usuarios/gloncochino/imagen/cambios%20de%20estado_esquema.gif" border="0" alt="" /></a><div class="blogger-post-footer"><img width='1' height='1' src='https://blogger.googleusercontent.com/tracker/2581766978630253023-7991300669458893316?l=blogmartaorihuel.blogspot.com' alt='' /></div>Marta Orihuelhttp://www.blogger.com/profile/08837559117293592813noreply@blogger.comtag:blogger.com,1999:blog-2581766978630253023.post-84856321689500042102009-11-10T10:08:00.000-08:002009-11-28T13:34:06.207-08:00<object width="340" height="285"><param name="movie" value="http://www.youtube.com/v/0UW90luAJE0&hl=es&fs=1&color1=0x402061&color2=0x9461ca&border=1"></param><param name="allowFullScreen" value="true"></param><param name="allowscriptaccess" value="always"></param><embed src="http://www.youtube.com/v/0UW90luAJE0&hl=es&fs=1&color1=0x402061&color2=0x9461ca&border=1" type="application/x-shockwave-flash" allowscriptaccess="always" allowfullscreen="true" width="340" height="285"></embed></object><div class="blogger-post-footer"><img width='1' height='1' src='https://blogger.googleusercontent.com/tracker/2581766978630253023-8485632168950004210?l=blogmartaorihuel.blogspot.com' alt='' /></div>Marta Orihuelhttp://www.blogger.com/profile/08837559117293592813noreply@blogger.com