Risultati della ricerca
Anno XXXVI - n.2 - aprile/giugno 2003 Aristotele fu il primo fisico?
Ever since Galileo attacked Aristotle’s view of the world, the Greek philosopher’s ideas have been regarded as a barrier to scientific progress. The author disagrees. […]
Anno XXXVI - n.2 - aprile/giugno 2003 Passaggio della luce attraverso un pacchetto di lastrine
The article describes an experiment on the absorption of light through a pile of sheets of Perspex or glass. The experiment, in itself simple to perform, lends itself to a rich conceptual analysis and introduces a discussion of some aspects of the scientific method and of the search for physical laws. […]
Anno XXXVI - n.2 - aprile/giugno 2003 Derivazione con Excel della legge di Maxwell-Boltzmann delle velocità molecolari
The article shows how the Maxwell-Boltzmann’s distribution law of molecular velocities, a physics law of statistic nature, can be tested using an electronic spreadsheet. The spreadsheet simulation allows a better understanding of the statistic aspects at the basis of the phenomena while acquiring skills in the use of this advanced software. […]
Anno XXXVI - n.1 - gennaio/marzo 2003 Trasformazioni di fase nell’acciaio
Many properties of steel depend on its microcrystalline structure. By heating a steel wire it is possible to show, with a simple experiment, how its mechanical and magnetic characteristics change with phase transformation in solid state steel. […]
Anno XXXVI - n.1 - gennaio/marzo 2003 Le risorse degli studenti per apprendere la fisica di base
With good reason, physics education research has focussed almost exclusively on student difficulties and misconceptions. This work has been productive for curriculum development as well as in motivating the physics teaching community to examine and reconsider methods and assumptions, but it is limited in what it can tell us about student knowledge and learning. […]
Anno XXXVI - n.1 - gennaio/marzo 2003 Intensità di segnali acustici e luminosi
An experimental procedure is described for studying how certain subjective quantities, such as the perceived intensities of light and sound, depend on the observer’s distance from the source. […]
Anno XXXVI - n.1 - gennaio/marzo 2003 Pesare l’aria
A direct simple method for measuring the specific gravity of air is described. The method is based on a new idea for measuring the pressure of air, compressed into a plastic bottle by means of a common bicycle pump. […]
Anno XXXVI - n.1 - gennaio/marzo 2003 Le rotazioni elettromagnetiche
Two easy experiments devised to help undergraduate students understand the concept of non-conservative fields are suggested. The idea is inspired by the early work of Faraday on the interactions between magnets and current carrying elements. In the first experiment two magnets rotate around a linear conductor; […]