Reports on apparatus for generating Lissajous figures, projecting Poisson's spots, photographing diffraction patterns, electric heating, and projecting moving longitudinal waves on an oscilloscope. (SL)

Describes four science experiments relating to energy developed for interdisciplinary general science courses. (SL)

Gives an explanation to the process of charging the conventional leaf electroscope, by induction, using a charged insulated rod. (GA)

Described is a physics experiment in which carbon dioxide cartridges mounted on a wheel with a spark timer can be utilized to measure the energy release of the cartridges. (SL)

Describes the construction of the Reduced-Gravity Demonstrator, which can be used to illustrate the effects of gravity on a variety of phenomena, including the way fluids flow, flames burn, and mechanical systems behave. Presents experiments, appropriate for classroom use, to demonstrate how the behavior of common physical systems change when…

Presents a simple and inexpensive procedure for determining the moment of inertia of a physical pendulum both experimentally and analytically. The simplicity of the apparatus enables students to easily change parameters and obtain a wide variety of measurements. (JRH)

Describes an experiment that involves measuring the intensity of laser light passed by a linear polarizer. Discusses polarization effects, orthogonal polarizations, instrumentation, and further experiments. (JRH)

Presents experiments that use Helmholtz resonators and have been designed for a sophomore-level course in oscillations and waves. Discusses the theory of the Helmholtz resonator and resonance curves. (JRH)

Discusses the behavior of the current near the end of the paper in the electric-field mapping experiment and approaches to solving problems associated with this behavior. Presents programs that can be used to model the boundary condition computationally. (JRH)

Describes an experiment to measure the speed of air in the air jet caused by blowing air through a drinking straw. (JRH)

Describes a diffraction experiment that uses circular holes salvaged from nonaerosol hair spray bottles to produce spectacular circular interference fringes. (JRH)

Presents ideas on how common household light bulbs can be used to develop interest in learning physics. Focuses on supermarket data taking and analyses, filament temperatures, detective work with three-way bulbs, and lifetime statistics. (YP)

Describes an experiment to measure the acceleration of a bungee jumper. Uses energy considerations to explain this anomalous acceleration and presents experimental results using several different types of ropes and a chain. (JRH)

Provides a method for correcting the photoemission from a collector when using the photoelectric effect experiment to determine Planck's constant. The problem results from a negative current through the cell and makes the measurement of the cutoff potential difficult. (DH)

Presents activities that use a simple homemade apparatus called "the cannon" to demonstrate Newton's Third Law. Reviews the chemistry concepts behind the ignition of the cannon and presents the Momentum Lab and the Projectile Motion Lab. (JRH)