Describes activities concerning interference phenomena derived from illuminated rotating soap films. Suggests reflecting incident light off of the soap film onto a projection screen. Discusses several possible experiments, how to make soap solutions, and vibrating soap films. (MVL)

Describes a set of experiments using a UV-VIS spectrometer to identify food colorings and to measure the pH of soft drinks. The first laboratory component uses locations and shapes of visible absorption peaks as a means of identifying dyes while the second portion uses the spectrometer for determining pH. (PVD)

Explains that some metal springs have an initial tension that must be overcome before using the F=kx relationship (Hooke's Law) for experimental calculations in the physics laboratory. (WRM)

Explains how to determine the polarity of static electric charges by using an electrician's tool called the test pencil. (WRM)

Presents a method for measuring the speed of light using a laser pointer with adjustable focus as the signal carrier, a signal generator to modulate the light beam, and a student oscilloscope to detect the phase shift. (Author/CCM)

Describes a simple manual apparatus designed to serve as an effective demonstration of the differences between isothermal and adiabatic processes for the general or elementary physics student. Enables students to verify Boyle's law for slow processes and identify the departure from this law for rapid processes and can also be used to give a clear…

Describes a general chemistry experiment that is carried out in sunlight to illustrate the ability of TiO2 to act as a photocatalyst by mineralizing an organic dye into carbon dioxide. Details about the construction of the reactor system used to perform this experiment are included. (DDR)

Describes how to construct a safe, inexpensive rocket for use with young children. (MKR)

For several decades there has been a general concern that the level of research funding for academic instrumentation was not sufficient to keep pace with the requirements of cutting edge research. To develop the factual trend data necessary to understand the depth of the problems in academia and thus provide an adequate response to these concerns,…

Describes the construction of a moving model for demonstrating kinetic theory and explains how it can be used to represent all three states of matter. (GS)

Lists activities of the February 2-5, 1976, joint meeting of The American Physical Society (APS) and the American Association of Physics Teachers (AAPT) in New York city. (CP)