This is a discussion of the conservation of angular momentum of the human body engaged in somersaults and twists. The principle is also applied to a cat turning over in midair. The events occur in the absence of torques. Application of the maneuvers are suggested for astronauts. (SA)

Describes a variation of the familiar laboratory investigation on the spring and mass oscillator. (SK)

This paper gives an account of research on the structure of turbulence close to a solid boundary. Included is a method to study the flow close to the wall of a pipe without interferring with it. (Author/JN)

Shows how through proper handling of the nonuniform motion of semiclassical coordinates spurious excitation terms are eliminated. An application to the problem of nuclear Coulomb excitation is presented as an example. (HM)

Focuses on some associations between movement and social relations using as an example the dance-play (nkwa) of the Ubakala Igbo of the former Eastern Region of Nigeria. Discusses how the dance is used to promote self-identity, prescribe and assert social values and roles, and mediate between persons and their situations. (JMF)

Describes a student investigation of a reverse flame in a atmosphere of methane that won second place in the physics division of the International Science and Engineering Fair. Includes a discussion of falling and fracturing behavior, specifically dealing with chimneys, trees, pencil point, stirring rods, and chalk. (BT)

Discusses several different methods that performers (divers and trampolinists) use to initate somersaults and twists and presents concrete examples of each method. Presents and evaluates quantitative calculations using information about the moments of inertia, mass, etc., of "typical" performers. (Author/GA)

The author argues that a Lagrangian that yields equations of motion for a damped simple harmonic oscillator does not describe this system, but a completely different physical system, and constructs a physical system that the Lagrangian describes and derives some of its properties. (Author/GA)

Investigates the "photographic" appearance of a cube moving at relativistic speeds, and shows that it depends upon whether the camera is held fixed with the optic axis perpendicular to the direction of motion or panned to follow the cube as it moves. (Author/GA)

Describes an experiment in which an air table is used to measure the moment of inertia of air pucks with various radii and mass loadings. (BT)

Discusses the effect of vehicle mass on stopping distances. Analyzes an example of a sample vehicle and tire, and calculates the braking acceleration showing the effect of different factors on the stopping performance of the tires. (GA)

Describes the design of an experiment that is used to determine the acceleration of an accelerating system with the help of an airtrack and a pendulum. (GA)

Describes the following: a device which converts the displacement of a pendulum into an electric signal and is used as a voltage generator of low frequencies; a turn-by-turn transformer demonstration; how to remove the buoyant force on a piece of cork immersed in water; and how to demonstrate Coulomb's Law on the overhead projector. (GA)

This article discusses the species designation and taxonomies of Delaware and Algonkian and presents eight classifications of taxa by form, habitat, color, movement, sound, use, relationship, and appearance. Relevant research is also reviewed. (CLK)

Explores sex and age differences in the level of object representations and human movement in the dreams of adolescents. Dream analyses from 106 adolescents reveal significant differences in quality of object representations in male and female adolescents' dream content. Females' dreams contained significantly higher amounts of human movement than…