An introductory physics experiment has been developed to address the issues seen in conventional physics lab classes including assumption verification, technological dependencies, and real world motivation for the experiment. The experiment has little technology dependence and compares the acceleration due to gravity by using position versus time…

Describes the making of artificial urine for laboratory experiments which supplies all the major properties of human urine. (MKR)

Presents important principles and issues related to postpositivism including logic of confirmation and logic of falsification. Discusses possible applications in science education. Lists 23 references. (YP)

Suggests a way of distinguishing between the two classes of chemical reactions of the lanthanide series. (CS)

Described are some new uses and procedures of titration procedures. Topics included are titration in non-aqueous solvents, thermometric titration and catalytic methods for end-point detection, titration finish in organic elemental analysis, and sub-micro analysis and automatic titration procedures. (CS)

Reviews recent findings regarding the preovulatory surge of luteinizing hormone (LH) in the reproductive cycle. Diagrams and textual information are presented detailing aspects of the feedback loops involved in the hypothalamo-pituitary-ovarian axis. (CS)

Reviews calculations that derive an order of magnitude expression for the size of man in terms of fundamental constants, assuming that man satifies these three properties: he is made of complicated molecules; he requires an atmosphere which is not hydrogen and helium; he is as large as possible. (CS)

Reviews the application of orbital symmetry principles to an understanding of the fluxional behavior of certain organometallic compounds, with particular reference to the cyclopolyenylmetal systems. (CS)

Discusses the evidence concerning the relationship between man's technological behavior and his ecosystems regarding thermodynamic principles concerning the food and people issue. (BR)

Gives a numerical example of the steady-state assumption, using three calculations for the free radical decomposition of methane. (MLH)

Discusses the distribution of kinetic and potential energy in transverse and longitudinal waves and examines the transmission of power and momentum. This discussion is intended to aid in understanding the simple harmonic motion of a particle involved in the propagation of a harmonic mechanical plane wave. (HM)

Presents a physical inorganic experiment in which large single crystals of the alkali halides doped with divalent ion impurities are prepared easily. Demonstrates the ion pairing of inorganic ions in solid solution. (CS)

Describes an experiment for general chemistry that illustrates the use of spectroscopy in the synthesis, characterization, and nitration of tris(acetylacetonato)cobalt (III). (CS)

Describes how polydiacetylenes can be used as educational aids. These polymers have conjugated backbones, which cause changes in color when the polydiacetylenes undergo various chemical and physical processes. Diagrams summarize all chemical reactions and their associated color changes. (CS)

Presents a method suitable for intermediate level astronomy courses for the calculations of solar eclipses which avoids spherical trigonometry. (Author/CS)