Suggests an apparatus to improve the measurement of the mechanical equivalent of heat. Describes the materials needed to construct the apparatus; the methodology of an experiment to measure the heat gained by lead shot falling through a distance of 100 meters; and the calculations made to register that gain. (MDH)

Describes the history and the development of the field of superconductivity. Identifies the significant interaction of electrons to form Cooper pairs. Presents background theory, describes approaches, and discusses problems encountered in the search for better high temperature superconducting materials. Provides technological applications of…

Discusses (1) Japan's use of a combination of the National Uniform Test and locally administered exams as the sole criteria for university admission and (2) China's use of a National Entrance Examination, experimental examinations administered in Shanghai and Guangzhou, and a Qualifying Test for students over age 25 as university admissions…

Discussed are balloons and electroscopes, understanding cosmic rays, cosmic ray paths, isotopes and cosmic-ray travel, sources of cosmic rays, and accelerating cosmic rays. Some of the history of the discovery and study of cosmic rays is presented. (CW)

Develops the idea of fractals through a laboratory activity that calculates the fractal dimension of ordinary white bread. Extends use of the fractal dimension to compare other complex structures as other breads and sponges. (MDH)

An incident light ray parallel to the optical axis of a parabolic mirror will be reflected at the focal point and vice versa. Presents a mathematical proof that uses calculus, algebra, and geometry to prove this reflective property. (MDH)

Several ways of exploring the subject of global warming within the context of a conventional physics syllabus are suggested. The physics underlying greenhouse phenomena, the process of modelling (especially computers), possible future climatic scenarios, and the differing nature of the uncertainties associated with the many fields of study that…

This study described ways that sixth grade students invented strategies for working out difficult physics problems while using a motion program in the computer environment "Boxer." Strategies became a communal classroom resource and ground rules for their use were negotiated with the teacher. (MDH)

Describes the English Educational System, and contrasts the way physics is taught in the U.S. system on the following points: maturity, graduation requirements, laboratory work, student motivation, availability to students, and passage to higher education. (MDH)

Provided is a perspective on the teaching of a unit on the Earth in space. The themes to be found within the unit, approaches and resources that can be used for teaching and learning the subject, and some of the typical ideas that children hold about astronomical subjects are provided. (KR)

At Dickinson College (Pennsylvania), a workshop approach to teaching introductory physics, in which students alternate hands-on experience and theoretical discussion, has been effective in improving student attitudes toward the subject, helping students master concepts considered difficult to teach, making students comfortable with laboratory…

The situation regarding each Australian State's secondary physics syllabi are summarized. The planning directions necessary to keep such syllabi relevant to the changing needs of Australian secondary students are discussed. Factors influencing the implementation of these physics courses are described. (KR)

Discussed is how modern physics is usually approached via the photoelectric effect and how this can lead to a physically wrong picture of light. The importance of using the quantum theory developed after 1920 to explain the properties of light is discussed. (KR)

Described is the use of computer software, with and without guiding text, for a simulation that presents processes related to electric charges and electric forces underlying the electric-pendulum phenomenon. Included are methods for integrating this simulation with actual middle-school science class demonstration. (JJK)

A phenomenological explanation of this effect is provided. Suggestions for the inclusion of pyroelectric effects into a unit on electrostatics are given. (CW)