Risultati della ricerca
Anno XXIX - n.3 - luglio/settembre 1996 Movimento degli ioni in soluzione salina
This article the presents the results of a research on the change of electric voltage across a voltmeter, during the solution of a wheat of salt. It could be a stimulus for subsequent developments, even involving the class and the chemistry teacher in the project area of the biennium of the technical industrial institutes. […]
Anno XXIX - n.3 - luglio/settembre 1996 Un sistema a fotocellule per esperienze di meccanica
This note describes a system based on photogates and interfaced to a PC that can be particularly useful in physics experiments in which the description of objects’ motion is relevant. The PC role is twofold: on one side it is the system timer, […]
Anno XXIX - n.3 - luglio/settembre 1996 Semplici esperimenti di Fisica nella Scuola Media dell’obbligo
This article presents three experiments on sound propagation and structure of matter, requiring simple materials, suited to middle school pupils. […]
Anno XXIX - n.2 - aprile/giugno 1996 Un problema “reale” per capire la fisica
Tacking a Real World Problem for Understanding Physics. Scientific knowledge is a complex game aimed at constructing a representation of reality characterised by specific questions, languages, ways of operating. Acquiring scientific knowledge therefore involves the ability of thinking and operating within a representation of reality, […]
Anno XXIX - n.2 - aprile/giugno 1996 La scoperta della superfluidità
Superfluidity and superconductivity have strong analogies to each other. Why then did over a quarter of a century passed between the discoveries of these two phenomena? […]
Anno XXIX - n.2 - aprile/giugno 1996 I circuiti oscillanti accoppiati: un’analogia classica per spiegare la formazione delle bande di energia nei solidi
The splitting of the resonant frequencies of N oscillatory LC circuits interacting by the mutual induction between their coils is a classical analog for the formation of energy bands in the system of interacting atoms in a crystal lattice. This article describes how to carry out an experimental demonstration of this phenomenon. […]
Anno XXIX - n.2 - aprile/giugno 1996 Esperienze didattiche con programmi di simulazione astronomica
This article describes some useful experiences made in the teaching of physics through the use of astronomical simulation software. […]
Anno XXIX - n.2 - aprile/giugno 1996 Scuola di media
The concept of mean is one of those proposed to students mainly relying on intuition. This paper, which is addressed to teachers, has strictly didactic aimsand, although making progressive generalisations, gives examples from the basics of physics. […]
Anno XXIX - n.2 - aprile/giugno 1996 Una versione moderna dell’esperimento di Fourier sulla conduzione termica entro un anello di metallo
This work deals with a famous historical experiment, i.e. the experiment that allowed Fourier to establish his theorem about the series expansion of a periodic function. In our experiment, that deals also with many aspects of the theory of heat, we warmed up an aluminium ring by means of a flame pointed towards a single point of the ring. […]
Anno XXIX - n.2 - aprile/giugno 1996 La radio a cristallo
After describing the working principles of the crystal radio, the author puts them into practice designing, assembling and testing a simple radio system. Didactic suggestions are given. […]
Anno XXIX - n.2 - aprile/giugno 1996 La velocità della luce
A short history of the measurement of the velocity of light from Galileo to our days. with particular reference to Foucault’s method, which has been used in an experiment for didactic purpose. […]
Anno XXIX - n.2 - aprile/giugno 1996 Amplificatore di condizionamento per Universal Lab Interface
The cheap circuit here described makes possible to process signals in an arbitrary range (e.g. ± 10V) without an external supply, using the positive supply (+5V) available on the U.L.I. interface connector. […]