The knowledge base that defines exercise physiology is central to the discipline of kinesiology. By the late 19th century, interest in physical training, physical education, and sports began to emerge in the United States. By the beginning of the 20th century, exercise physiology was being included in college physical education degree programs,…

The physical analysis of a uniformly accelerating point charge provides a rich problem to explore in advanced courses in electrodynamics and relativity since it brings together fundamental concepts in relation to electromagnetic radiation, Einstein's equivalence principle and the inertial mass of field energy in ways that reveal subtleties in each…

This study explored the relationship between articulator movement and prosody in children at different developmental ages. Jaw, lower lip, and upper lip kinematics were examined in 4-, 7-, and 11-year-old children as they produced the declarative and interrogative forms of utterances "Show Bob a bot" and "Show Pop a pot." Articulator movement…

Newton's Cradle is a series of bifilar pendulums used in physics classrooms to demonstrate the role of the principles of conservation of momentum and kinetic energy in elastic collisions. The paper reviews the way in which textbooks use Newton's Cradle and points out the unsatisfactory nature of these treatments in almost all cases. The literature…

The use of Calculator-Based Laboratory (CBL) technology, the graphing calculator, and the cooling and heating of water to model the behavior of consecutive first-order reactions is presented, where B is the reactant, I is the intermediate, and P is the product for an in-class demonstration. The activity demonstrates the spontaneous and consecutive…

Explains an error that occurs in calculating the conditions for a maximum value of a rate expression for a bimolecular reaction. The rate expression is derived using the Langmuir adsorption isotherm to relate gas pressures and corresponding surface coverages. (GS)

This study investigated the static balance performance of 20 nonhandicapped and 20 learning disabled male children in Texas by comparing mean distances of center of pressure displacement as measured by a forceplate. Specifically, mean displacements in the medial-lateral plane during five static balance tests were measured from a neutral starting…

The Langmuir-Hinshelwood equation is fundamental to the study of heterogeneous catalysis, and forms a basis of the study of bimolecular heterogeneous reaction rates. (BB)

Compares the preparation and decomposition of potassium dibromoiodate and of phenyl iodine dichloride in a flexible experiment which accustoms the student to handle halogens, to test for halogens in mixtures, and to appreciate the difference between thermodynamic and kinetic control of reactions. (Author/MA)

This study investigated the muscular torques and joint forces during the parallel squat as performed by weightlifters. (JD)

Female fast pitch softball batters served in an examination of the dynamic characteristics of the bat during the swing through the use of three-dimensional cinematographic analysis techniques. These results were compared with those from previous studies of baseball batting. Findings are listed. (Author/DF)

Data on motions involved in kicking a football were subjected to multiple regression analysis to ascertain the kinesiologic determinants of the foot's arcing motion. (GW)

Short articles describe techniques for stroboscopic photography of moving objects, mechanical and electronic demonstrations of beats at radio frequencies, simple apparatus for the determination of the specific heat of steam, and the measurement of electrostatic potential by a flame probe. (AL)

Summarizes a doctoral thesis that validated a Gagnian learning hierarchy and showed that graphical skills were more quickly learned the greater the guidance that was given, but that there was no difference in retention and transfer between guided and discovery learning of these skills. (AL)

The number of flies that crawl through a small hole from one chamber to another is used to demonstrate principles of chemical kinetics. (CP)