if you want to know why empty spaces(only having air) are an - TopicsExpress



          

if you want to know why empty spaces(only having air) are an obstacle to these vibration(earthquake) just make acircular hole space with in the solid and subject it to vibrations. and put suspended ball. the ball will experience little effects from the vibrations. but get brushes spikes in folk like form and make them to be in contact with the ball and cause vibrations again in the solid. the ball will also vibrate now with increased forces.
Posted on: Tue, 18 Mar 2014 09:28:33 +0000

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