Determinação do teor alcoólico da cachaça: uma abordagem das propriedades intensivas

The Resolution number 3 of the Câmara de Educação Básica (CEB)/Conselho Nacional de Educação (CNE), published in 1998, June 26 (BRASIL, 1998), which established the National Curriculum Guidelines for High School Education, emphasizes the interdisciplinarity, in its 8th Article. However, almost fourteen years later, the reality in most of our schools is the adoption of a merely disciplinary methodology, vis-à-vis the difficulty related to educational planning activities of this kind. In this paper, we present a proposal of an interdisciplinary experimental activity that addresses the concept of surface tension, connecting physicists and chemists. The idea is that students determine the alcohol content of “cachaça” and discuss the concepts of surface tension forces between equal molecules, similar and different.

Análise de biografias de Einstein em dois livros de divulgação científica

In this paper we analyzed and compared two Albert Einstein’s biographies. The first one was “Albert Einstein and his inflatable universe”, written by Mike Goldsmith. The second biography was “Einstein – his life and universe”, written by Walter Isaacson. The intention of this comparison was to identify convergent and divergent points between two books, beyond verifying the possible neglected important points of Einstein’s life suppressed by Goldsmith to facilitate the comprehension of the text. Such details are those that we consider important to Albert Einstein’s intellectual development, and may have significantly contributed to the development of his theories. For this, our analysis was grounded in Douglas Allchin’s perspective, whose work presents aspects in the rhetoric of the text that contribute to the Science and scientist mystification.

Protótipo de uma atividade experimental para o estudo da cinemática realizada remotamente

Este artigo apresenta uma avaliação de um protótipo relativo a um experimento de cinemática que pode ser controlado remotamente via internet. Para tanto, utilizamos microcontroladores da família PIC, visando controlar a velocidade de carrinhos de brinquedo. O intuito foi investigar a possibilidade de se construir um laboratório de Ensino de Física totalmente controlado remotamente com vistas a apoiar cursos de formação inicial e continuada de professores ministrados a distância. A avaliação do protótipo foi realizada por 15 alunos de um curso presencial de Graduação em Física, no âmbito da disciplina de Instrumentação para o Ensino da Física. Os resultados apontam para a viabilidade da utilização desse recurso.

A produção técnico-científica de James Precott Joule: uma leitura a partir da epistemologia de Ludwig Fleck

This paper aims an epistemologically analysis of the attempt of James Prescott Joule to replace the steam engine by the electric one. In this historical analysis, we use the epistemological categories: style of thinking, collective thinking, intercollective circulation of ideas and practices,Joule and other technicians in Machester received in that time financial incentives from governments and industry to replace the steam engine by the electric one, since it was in Manchester a culture of the technique of the accuracy and precision in which Joule was immersed, which allowed us to initially identify the styles of techniques thinking and experimental efficiency. However, Joule could not replace the steam engine by the electric; and the awareness of the problems faced by him, in the attempt to make such a substitution, led him to seek, through an intercollective circulation of ideas and practices, such as the studies of Faraday and Jacobi, a change of direction in his researches. According to our analysis, what happened was a change of style from a technical to a scientific thinking. In this sense, Joule began to investigate issues of a scientific nature, as the Joule’s effect and the mechanical equivalent of heat, which contributed significantly to the establishment of the principle of conservation of energy. We present here the contributions of this epistemological analysis to the discussion of questions of the nature of science in the basic education and for the training of physics teachers.

Função estética dos signos artísticos para promover processos discursivos em sala de aula

The study investigated the use of an artistic work as mediator to trigger and sustain discursive participation of high school students in the classroom. Since the discursive dimension is an essential factor in constructivist teaching orientation, the general idea behind the work seeks to make use of the aesthetic function of signs to enhance the participation of learners discourse. With this goal in mind, the artistic sign painting Water Fall of the artist Maurits Cornelis Escher is employed for teaching physics concept of conservation of mechanical energy. The study compares two methods of a teacher who tries to promote students interactivity discursive. One methodology is guided only by formulating questions and other uses also an artistic sign along with the questions. The work shows that the teacher gets more successfully discursive participation of their students using the second methodology.

Avaliação de monitorias realizadas em um centro de ciências

In this paper we investigate the social interaction established between monitors and student-visitors to a science museum in terms of knowledge mobilized by the explanation about principle operating of Van De Graff Generator. Our research was conducted at a university public that maintains a Center of Sciences and the data were collected through recording video and audio of the dialogues established around a demonstration experiment. Data analysis is established around the conceptual correctness of the explanations made by the monitors. We also conducted a structured interview from a single question: what is the main difficulty faced in planning and conducting his presentation at the Science Center? The results show that the monitors were not able to exceed the process description of the operation of the experimental equipment, not being able to establish an interaction that fosters discussions of scientific concepts with visitors. Our research also found that, although the university maintained a Sciences Center, not there is a link between teacher training and activities in non-formal settings.

Sequência didática como instrumento para a aprendizagem significativa do efeito fotoelétrico

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Um estudo sobre a falta de padronização no uso de grandezas físicas em um curso de Engenharia Elétrica e Eletrônica

Pós-graduação em Ensino de Física - FCT

Duração da qualidade de ovos estocados de poedeiras criadas no sistema “cage-free”

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)