Presents a kinetic study that utilizes a method for varying the concentrations of the possible Ce(IV) species and computing the concentration distribution of the sulfato and hydroxo species of Ce(IV). (MLH)

Although students who used the Physical Science Study Committee experiments improved in their understanding of the conservation of momentum, greater gains were made by those who used a computer simulation of one dimensional elastic collisions in a vacuum. (AL)

Short articles describe the demonstration of Brownian motion in a bubble included in a quartz crystal, an inexpensive technique for investigating conservation of momentum, a method of teaching vector addition, and ideas for inexpensive substitutes for heavy masses and for additional laboratory bench space. (AL)

Describes an intermediate level mechanics course based on the solution of problems by computer. The nature of these problems and their solution by computer is discussed, and the sources of the programs indicated. (Author/TS)

A discussion of linear collisions between two or three objects is related to a junior-level course in analytical mechanics. The theoretical discussion uses a geometrical approach that treats elastic and inelastic collisions from a unified point of view. Experiments with a linear air track are described. (Author/TS)

Describes first grade science activity using soda straws, piNs, blocks of wood, paper clips, and washers as an introduction to weights and measures. Children worked independently in a problem solving manner with materials and recorded results by writing, drawing or tape recording. Varying student approaches, responses, and conclusions are…

Describes an apparatus designed to investigate molecular motion by means of light scattering. Light from a He-Ne laser is focused into a cell containing a suspension of polystyrene spheres. The scattered light, collected on the photosurface of a photomultiplier tube, is analyzed. The apparatus won first prize in Demonstration Lecture Apparatus in…