La compuerta mágica: discrepante en dos globos elásticos interconectados
2009; Volume: 3; Issue: 1 Linguagem: Inglês
ISSN
1870-9095
Autores Tópico(s)Multidisciplinary Science and Engineering Research
ResumoespanolEl proposito de este articulo es mostrar la fenomenologia y descripcion de un experimento discrepante que consiste de dos globos elasticos inflados con distinto volumen que se conectan por una valvula para controlar el flujo de aire. Mediante la hipotesis de que la energia potencial del globo es directamente proporcional a su area, se deduce una expresion general de Young-Laplace modificada para explicar el evento discrepante que corresponde al paso del aire desde el globo de menor volumen al de mayor volumen. Mediante un proceso adiabatico proponemos una forma de medir la constante elastica del globo. Se encontro que para justo dos veces el radio inicial del globo se presenta la maxima fuerza de las paredes elasticas del globo. Este montaje ha sido utilizado como proyecto de investigacion en el Aprendizaje Activo de la Fisica para estudiantes de ingenieria. EnglishThe purpose of this article is to show the description and phenomenology of a discrepant experiment consisting of two elastic inflated balloons with different volume that are connected by a valve to control the flow of air. By assuming that the potential energy of the globe is directly proportional to its area, it follows a general expression of Young- Laplace modified to explain the discrepant event that corresponds to the passage of air from the balloon to the lower volume of higher volume. Through an adiabatic process we propose a way to measure the elastic constant of the globe. We found that for two times the initial radius of the balloon is the maximum force of the elastic walls of the globe. This prototype has been used as a research project on active learning in physics for students of engineering.
Referência(s)