I problemi orali di Fisica della Scuola Normale Superiore di Cachan (Francia)

In 1998 a book was published in which some physics problems from oral admission examinations at Ecole Normale Sup6rieure in Cachan (France) were collected. These are all problems dealing with physical phenomena of our daily life, used to investigate the ability of candidates in constructing a good model of different physical situations. Two such problems as a sample are presented and discussed.