La engañosa simplicidad del "método de Stokes" para medir viscosidades

AUTOR(ES)

Sandoval, Claudia, Caramy, Jorge, Salinas, Julia

FONTE

Revista Brasileira de Ensino de Física

DATA DE PUBLICAÇÃO

2009-12

RESUMO

In this article we focus on the relation between magnitudes used to measure liquid viscosity coeficients with Stokes’ method. The related experiment is a low-cost, and apparently also a very simple one. Its simplicity however rests on the exacting conditions that must be fulfilled by the system. Otherwise, it is incorrect to assume the validity of the usual relation between magnitudes. We deal with some punctual aspects related to this laboratory practice. Their treatment may increase students’ interest and favor a better learning. We propose clarifying, complementary theoretical developments, most of them of qualitative type, which may be incorporated to the experiment in opportune moments, so as to help students’ deeper comprehension of the subject. We also present an improved experimental design with several measured results, their analysis and the conclusions. We finally expose a brief synthesis of the aspects under consideration, as well as some reflections about teaching practice.

Documentos Relacionados

• Propuesta de una escala para medir la calidad del servicio de los centros de atención secundaria de salud
• Adaptación transcultural del cuestionario KIDSCREEN para medir calidad de vida relacionada con la salud en población mexicana de 8 a 18 años
• Aplicación del metodo geoelectrico para la determinacion de horizontes salinos en la colonia lloveras - pcia de San Juan - Argentina
• Potencialidades computacionales del Método de los Elementos Finitos para la modelación y simulación de materiales compuestos: revisión
• Comentário a “Método e questão judaica em Hannah Arendt”