Explains the inertia ball demonstration qualitatively. For the advanced level the demonstration is treated as a forced harmonic oscillator and the results verified analytically. Computer-generated graphs show that with a rapid pull, the upper cord may break, or the upper and lower cords may break simultaneously. (Author/GA)

Describes the construction of a direct-reading inertial balance that works on the same principle as that used by astronauts in space when weightless. It is used to help demonstrate and measure inertial mass. (GA)

Introduces a simple one-dimensional model of a diatomic molecule that can explain all the essential features of a real two particle quantum mechanical system and gives quantitative results in fair agreement with those of a hydrogen molecule. (GA)

The exact dynamics is presented for a two-particle model. By expressing canonical ensemble averages in terms of time-energy averages, a deeper understanding of the dissociation property is achieved. (BB)

An explicit physical interpretation of the electromagnetic vector potential is indicated as field momentum available for exchange with kinetic momenta of charged matter. (BB)

Describes how many of the geometrical and physical properties of the binary elastic collision of two particles can be represented by an isoceles trapezoid in the velocity space. (BB)

Describes an experiment to verify the Compton collision formula and the angular dependance of the Klein-Nishina formula. Equipment used is a 1-mCi(137)Cs source, 2x2 in. NaI detector and a multichannel analyzer. Suitable for honor undergraduates. (Author/GA)

Describes the differential equation solution to the mechanics problem of the motion of a free mass subject to a harmonic force which can also be illustrated by a simple analogue computer. (SL)

Describes a simple device for observing solar spectra, an inexpensive circuit to produce two sinusoidal signals, a method of demonstrating Charles' Law with plastic bags, and discusses the hazards of connecting a vacuum pump to a gas jet. (SL)

Presents methods for estimating running speed, length of a broad-jump, height of a pole vault, and time to run up a flight of steps as examples of elementary numerical mechanics. (SL)

Describes a model used to convey the concepts of generators, electric motors, and electric meter operation. (SL)

Presented is the design of an electrical analogue of the simple pendulum--a one-dimensional oscillator resonating within a frequency range which can be generated and observed with readily available instruments. One possible study sequence is outlined. (Author/MA)

Discussed are how the thermal vibrations of a solid are described in terms of lattice waves, how these waves interact with other waves, or with themselves, and how one is led from such a description in terms of waves to the concept of a phonon. (Author/MA)

Presents a new application of the WKB approximation to the hadronic atom elementary enough for undergraduate quantum mechanics students. (SL)

Describes a slide rule which can be used to simplify the quantum mechanics of half-integral spin. (SL)