Briefly considers the nature of physics laboratories and their role in the physics curriculum. Also considers three valuable outcomes of laboratory experiences: using equipment, doing real experiments, and handling phenomena. (JN)

Compares various methods of defining derived quantities, arguing for a definitional formula using base or fundamental units in a word equation, or symbol-equations with the symbols explained. Suggests that fundamental units be defined operationally or left regarded as intuitive as in the case of length and time. (JM)

Measurement of harmonic amplitude and phase response are discussed, focusing on an instrument used to demonstrate motion of a damped system when oscillating freely and motion of the same system when driven into harmonic oscillation. Includes procedures, sample results, and comparison of results to values calculated from geometry of the system. (JM)

Describes a continuous sequence of development of arithmetical and ratio reasoning capacity which very few students now attain in introductory science courses. Sequence progresses from verbal interpretation of ratio of two numbers, to arithmetical reasoning involving division, coupling arithmetical reasoning to graphical representation, and to…

Experiments which illustrate the effect of humidity on human hair and on paper are described. Also described are two ways to make a hygrometer. These methods were found in a series of British television programs (also available in the United States). Comments on the programs are included. (JN)

Investigated learning of the energy concept during physics instruction in grades seven to 10, focusing on meanings of words (names of concepts) and tasks involving motion. Results indicate severe limitations of the impact of physics instruction on learning the concept. (JN)

Discusses two activities suitable for group involvement or demonstration purposes. The first focuses on factors which determine how much time an object (such as a ball) will take to fall to the ground from a certain height. The second concerns the nonconservation of volume when two soluble liquids are added together. (JN)

The presence of gravitational waves was predicted by Einstein in his theory of General Relativity. Since then, scientists have been attempting to develop a detector sensitive enough to measure these cosmic signals. Once the presence of gravitational waves is confirmed, scientists can directly study star interiors, galaxy cores, or quasars. (MA)

Discusses the analog simulation of several quantum mechanical problems, including the Schrodinger equation and the de Broglie relation. (MLH)

Described is a secondary level physics laboratory course designed to teach analytical thinking. Included is an analysis of a typical activity requiring the student to create and complete his own experiment. (SL)

Described is a device for demonstrating photoelasticity, utilizing an overhead projector. (SL)

Discusses a high school laboratory in which the students take an active role in designing, implementing, and performing experiments concerning basic concepts in physics. (MLH)

Described are the development, materials, and use of English developed science activities for junior high schools, the Nuffield Combined Science Themes for the Middle Years. The program, when completed will present 24 themes including: color, water, air, plastics, metals, insects, food, light, and electricity. (SL)

The relationship between the academic achievement in physics of second year college students and the students' motivation was investigated. Among the findings were that motivation to satisfy security needs is negatively related to academic achievement in physics. (BT)

Presented is a review of the physical acoustics of percussion instruments. Instruments included are the glockenspiel, marimba, xylophone, vibes, chimes, and triangles. (SL)