Presents a novel graphic representation for complex musical spectra, based on component intervals rather than component tones. Provides examples of this kind of plot in representing complex intervals and chords, discussing perceptual data; and carrying out various types of consonance analysis. (Author/CS)

Provides three examples of paradoxes from physics and one from astronomy to show how paradoxes may be used in addressing specific deficiencies in understanding. (CS)

Demonstrates an extension of the customary discussion of rotations to produce naturally a number of augnear momentum operator properties, if coordinate-free rotation operators are used in their exponential form. This form gives rise to a particularly useful coordinate-free representation of the generators of rotations in three-space. (CS)

Discusses the problem of the mathematical pendulum in its classical, semiclassical, and quantum aspects. The energy spectrum and its eigenfunctions are presented under the usual requirement of single valuedness of the solutions. (Author/CS)

Examines the significance of Bruno's arguments from a scientific viewpoint. It is felt that even when correct in their conclusions, Bruno's scientific'' arguments do not exhibit any understanding of scientific reasoning or purpose. (DF)

Describes an introductory physics laboratory course, used at the University of California in Berkeley, designed to teach students some general intellectual skills. Results of the course evaluation are also discussed. (HM)

Provides a description and evaluation of a university's recently instituted physics learning center. Photos and text reveal some uses of the facility. (Author/CP)

This procedure, using polystyrene spheres of specified diameter, renders the Millikan oil drop experiment more accurate than the conventional procedure of the polystyrene spheres, eliminates size estimation error, and removes the guesswork involved in assigning proper index integers to the observed charges. (MLH)

Presents physics problems relating human body weight, activity, and energy expenditure. (SL)

Discusses an interdisciplinary course offered to senior students in physical, biological, and social sciences, with emphases on explaining the character of scientific work and the mechanisms underlying biological evolution. Included is a bibliography of available materials. (CC)

Describes the construction and operational procedures of a spark-timing apparatus which is designed to record the back and forth motion of one or two carts on linear air tracks. Applications to measurements of velocity, acceleration, simple harmonic motion, and collision problems are illustrated. (CC)

Discusses parametric oscillators and parametric instability. A simple, easy-to-construct system which exhibits parametric instability is presented. The two lowest-order resonances are described and analyzed in detail. The analysis stresses the physical and intuitive aspects of the problem. (Author/HM)

Describes an experiment used to study dielectric properties of materials. Values of the dielectric loss tangent can be determined at low frequencies from Lissajous figures formed on an oscilloscope. Some mineral rock specimens show Debye-type relaxation peaks at frequencies in the region of 1 to 500 Hz. (Author/DS)

Describes an undergraduate physics experiment for studying Curie temperature and Curie constant of a ferromagnetic material. The exchange field (Weiss field) has been estimated by using these parameters. (HM)