Discussed is a common error made by students in judging the distribution of the magnetic field of a circular loop along its diameter. Qualitative and quantitative explanations of the magnetic field distribution are presented. (CW)

Described is a demonstration which uses two electrodes attached to a piezoelectric buzzer that operates when inserted into a lemon. The calculation of cell potentials and the effects demonstrated are discussed. (CW)

The concept of displacement center for teaching the virtual work method in statistics is described. An analytical treatment of the displacement center is presented. An example which illustrates the essential elements of this concept is provided. (CW)

Presented is an experiment which provides a study both of the end correction involved with open pipes and also of the effect that varying the size of the tone hole in the pipe has on its fundamental frequency. Discussed are equipment, formulas, background, and methods. (CW)

Applications of this model to problems associated with basic phenomena in radioactivity, heat transfer, neutron chain reactions, RC circuits and vacuum pumping are presented. Example computations for each situation are included. (CW)

An outdoor activity that demonstrates the Doppler effect is described. Class predictions are verified by actual involvement in collecting data. Presented is a method of analyzing data. Safety concerns are discussed. (KR)

Student perceptions of the behavior of physics teachers in relation to selected variables in the classroom setting were investigated. High correlations between student perceptions of teacher behavior and affective outcomes are reported. (CW)

Reports on a survey which was undertaken to provide an overview of the biology content of a selection of General Certificate of Secondary Education science syllabuses. Lists syllabuses examined and the four themes in terms of which they were analyzed. Concludes that each contained a substantial biology component. (RT)

Describes a class activity, a game called "Beware--Radiation," developed as a framework for the introduction of the topic of radiation. Reports that both students and teachers had similar and mostly wrong preconceptions. (Author/YP)

Presents experiments which show that in electrostatics there are logical reasons for describing charged materials as positive or negative. Indicates that static and current electricity are not separate areas of physics. Diagrams of experiments and circuits are included. (RT)

Describes a computer simulation designed to examine secondary school students' strategies in solving a physics problem involving the velocity of a rocket. Students' beliefs about dynamics are discussed, use of the LOGO programing language to explore the idea of velocity is described, and ways in which simulations can support teachers' diagnostic…

Discusses a graphical analysis method used in the physics laboratory. Shown are various kinds of graphs to illustrate the relationship between two variables. A procedure for deriving equations from laboratory data is described. (YP)

Discusses making a computer-simulated rainbow using principles of physics, such as reflection and refraction. Provides BASIC program for the simulation. Appends a program illustrating the effects of dispersion of the colors. (YP)

Investigated is the value of preliminary high school experiences in physics and chemistry. Results indicate that the grades of students with more high school experience are no better than those of students with less experience and that less experienced students spend more time studying and take better advantage of tutors. (CW)

Describes how to make and use an inexpensive video disc of physics demonstrations. Discusses the background, production of the disc, subject of the disc including angular momentum, "monkey and the hunter" experiment, Doppler shift, pressure of a constant volume of gas thermometer, and wave effects, and using the disc in classroom. (YP)