XX International Physics Olympiad: Proceedings of the XX International Physics Olympiad, Warsaw, 16-24 July 1989

The International Physics Olympiad (IPhO) is an international competition on physics for high school students. The IPhO is organized in a different country every year. At present it involves about 35 countries. The proceedings consists of a short history of the International Physics Olympiads, the programme of the XX IPhO, the statutes, the syllabus, the texts of the problems and their detailed solutions. Cover......Page 1 Title Page......Page 4 Copyright......Page 5 CONTENTS......Page 8 THE EMBLEM OF THE XX INTERNATIONAL PHYSICS OLYMPIAD......Page 10 PREFACE......Page 12 ORGANIZING COMMITTEE OF THE XX INTERNATIONAL PHYSICS OLYMPIAD......Page 18 SPONSORS OF THE XX INTERNATIONAL PHYSICS OLYMPIAD......Page 22 INTERNATIONAL BOARD 1989/1990......Page 28 LIST OF COMPETITORS......Page 40 PROGRAMME OF THE XX INTERNATIONAL PHYSICS OLYMPIAD......Page 44 Problem 1......Page 54 Problem 2......Page 64 Problem 3......Page 76 Experimental Problem......Page 85 Histograms of marks......Page 96 MINUTES......Page 99 UNESCO CONSULTATION ON FUTURE DEVELOPMENTS OF SCIENCE OLYMPIADS......Page 107 PRIZE-WINNERS OF THE XX INTERNATIONAL PHYSICS OLYMPIAD......Page 110 STATUTES OF THE INTERNATIONAL PHYSICS OLYMPIADS......Page 115 THE SYLLABUS......Page 125 INTERNATIONAL PHYSICS OLYMPIADS HISTORY AND PERSPECTIVES......Page 135 ORGANIZERS OF THE INTERNATIONAL PHYSICS OLYMPIADS......Page 156