Articoli rivista
Anno XXXVIII - n.1 - gennaio/marzo 2005 Considerazioni sulla relatività
The philosophical meaning of Einstein’s relativity goes beyond common sense. Applications of the special theory overcome the human scale and require important abstractions. […]
Anno XLII - n.1 - gennaio/marzo 2009 Correndo sotto la pioggia
The well known question: ‘is it better to walk or to run in the rain’? can be advantageously proposed to secondary school students. The paper illustrates a method for estimating the number of raindrops vs speed that fall on a moving surface. […]
Anno XXXIX - n.1 - gennaio/marzo 2006 Correzioni alla legge di Stokes per la misura della viscosità di un liquido
The viscosity of a viscous medium can be found by measuring the terminal velocity of small falling spheres and applying Stokes’ law. The experiment is didactically interesting and easily performed in school, but because of the finiteness of the medium edge effects produce theoretical and experimental difficulties. […]
Anno XXVII - n.4 - ottobre/dicembre 1994 Cos’e’ un lock-in? a che cosa serve? come costruirne uno?
A short description of the lock-in technique gives an idea of the working principle of these useful devices, that are widely used in weak signal detection, but rarely treated in introductory courses. Simple and cheap circuits, that may be easily assembled by the student are suggested, […]