Articoli rivista
Anno XXIV - n.3 - luglio/settembre 1991 Trasformazioni energetiche nella catapulta romana (Scuola media statale “F. B. Busoni”, Empoli FI)
This article describes an entry to the Bonacini Annual Contest for experimental work in the school. The pupils built a model of an ancient roman catapult and measured its elastic constant and the projectile’s initial velocity. At the end the efficiency of the energy transfer was evaluated from the energy balance of the machine. […]
Anno XXIV - n.1 - gennaio/marzo 1991 Trasporto di inquinanti dal mare all’atmosfera
The bubble-breaking, droplet-ejecting mechanism is the main pathway of the mass-transport effect at water to air interface (primarily at sea-air interface, but also lake, river…). Surface-active organic material (SAOM) tends to concentrate at the water surface. The bubbles, produced primarily by breaking waves, […]
Anno XXVII - n.2 - aprile/giugno 1994 Tre programmi da computer per la junior high school.
The article describes three programs, which simulate three physical events: (1) radioactive decay, (2) the motion of a ball in a basketball game, and (3) the launching of an earth satellite. […]
Anno XXVI - n.2 - aprile/giugno 1993 Un adattatore di tensione fra lo standard americano e quello europeo
A commercial adaptor between the US and European mains standard plugs can be modified to act as a voltage transformer. No heat is produced because a reactive and not a resistive divider is used. The device is a simple example of the Ohm’s law in AC circuits. […]