The characteristic features of the Maxwell-Botzmann energy distribution function and its variation with temperature are demonstrated using visual displays and simple counting techniques. (DT)

A light flasher was developed for use with the open-shutter photography technique in elementary-mechanics experiments. Details are given of its design and construction. Five experiments, for the elementary mechanics laboratory, which use flasher units are described. (DT)

Describes an approach for deriving expressions for thermal conductivity and dynamic viscosity which does not consider the net flow of energy or momentum across a plane. (SL)

Expressions to describe fringe contours in the region of interference of two coherent beams are derived for three combinations of plane and spherical wave geometrics. (Author/SL)

Presents a simple means of visualizing and generating families of Rayleigh hysteresis loops. (SL)

The First Law of Thermodynamics is discussed based on childhood experiences such as playing with seesaws, falling balls, thrown balls, bouncing balls, friction, combustion, and arithmetic. (DF)

Describes activities using "Hot Wheels" cars as a means of introducing concepts of friction, inclined planes, and kinetic energy to elementary school children. (JR)

Discusses the description of pendulum motion on the Earth's surface utilizing mathematics at the level of average high school students. (SL)

Provides a definition of electric energy density by drawing a circuit analog. (SL)

The observations that would be made by a uniformly accelerated observer, including the observer's event horizon, the variation of clock rates with position, and the effects of following a freely falling object are considered in detail. (SL)

Discusses Hertz vector potentials and demonstrates their application to the calculation of electric and magnetic dipole radiation and to the propagation modes of a rectangular waveguide. (Author/SL)

Suggests an instructional presentation designed to give students an intuitive understanding of the uniform acceleration of a body falling toward the earth. (JR)

Describes the advantages of mathematical modeling approach in teaching applied mathematics and gives many suggestions for suitable material which illustrates the links between real problems and mathematics. (GA)

Presents a method for describing the electromagnetic field within a wave guide which permits the application of the formalism of quantum mechanics. (SL)