Uses the format of a dramatic play as a means of explaining the relativity of time to beginning physics students. (JR)

Discusses the problem of gravity as it relates to distance from the center of the earth, and reports contradictory explanations from different source books. Uses this example to illustrate that science should not be taught from a single source, such as a textbook. (JR)

A laboratory experiment is detailed which students can themselves perform to illustrate the subtleties of Einstein's theory of relativity. (JP)

Discusses the technology used for transduction between electrical and acoustical signals. In particular, the recent developments in microwave ultrasonics research are presented. (JP)

Reviews the Hafele-Keating experiment on relativistic changes in eastward and westward moving cesium atomic clocks. Recommends the use of the Sagnac effect to remove the east-west time asymmetry and of the general-relativistic effect to elucidate the clock-rate changes. (CC)

Discusses and explains the phenomenon of superconductivity and examines the properties of superconductors. (JR)

Discusses the concepts of weight and weightlessness and describes simple activities which can be used to demonstrate weightlessness. (JR)

Results indicated that a) the understanding of the conceptual schemes of relativity depended on grade level and on ability level within a grade, b) achievement decreased with increase in taxonomic level, and c) achievement was better in classical relativity than in special or general relativity. (Authors)