Einstein’s writings are examined in order to see how he treated the concept of mass and in particular if he ever introduced relativistic mass. The conclusion is that relativistic mass never appears – with the possible exception of the book The Evolution of Physics where some passages might lead the reader to think that mass depends on velocity. […]
We examine several “myths” of physics teaching that usually lead teachers in school to devote too much time to the treatment of inessential aspects to the detriment of more fundamental arguments. Among these we discuss the importance of numerical approximations, significant digits, […]
A teaching proposal using paper helicopters: simple experiments with on line equipment allow to study the motion of these amusing objects. […]