Describes an experiment producing a visible spectrum with inexpensive equipment available in the physics classroom. Discusses some related equations, apparatus settings, and instructional methods. (YP)

Describes an experiment which makes use of a number of concepts from geometrical optics. The apparatus and method which is intended for students in elementary college physics classes are included. (HM)

Describes the process of collecting and maintaining a culture of protozoa. Instructions are also given for constructing a micropipette for transfering small organisms. (SA)

Provides the apparatus setup, experimental method, necessary formulas, and references for three measurement experiments: (1) "Determine the Magnetic Induction of a Coil with a Hall Element"; (2) "Measuring Magnetic Force and Magnetic Field of Small Permanent Magnets"; and (3) "Measurements of Sound Velocity by Means of PZT" (piezoelectric…

Describes ways to use nomographs, including solving equations for equivalent resistance of a parallel circuit, focal length of a thin lens, parallel combinations of standard resistance, average speed, refraction problem, and height of a vertically projected object. (YP)

Describes an experiment to measure the thermal conductivity of some gases in an undergraduate physics laboratory using a hot wire method in the pressure range ten to one torr. (HM)

Describes a radiation experiment developed to complement a new environmental chemistry laboratory curriculum. A scintillation counter is used to measure radon in water. The procedure relies on the fact that toluene will preferentially extract radon from water. Sample preparation is complete in less than 90 minutes. Because the level of…

Described are three experiments on the photometric, Gaussian, and image-forming properties of a helium-neon gas laser. Details of the experimental method and typical calculations with diagrams and graphs are provided. (YP)

Explains the problem of analyzing a phase object, separating the contribution due to thickness variations and that due to refractive index variations. Discusses the design of an interferometer and some applications. Provides diagrams and pictures of holographic images. (YP)

Describes an apparatus that uses liquified gases to wash solids. Discusses the procedures and processes used to do a wash with liquid sulfur dioxide. (CW)

Describes an inexpensive, easy-to-construct manometric device that is a substitute for an expensive commercial transducer that is sensitive to slight pressure fluctuations. An activity for demonstrating the importance of CO-2 as a humoral regulator of respiration is described. (Author/SA)

Basic marine aquaria equipment, techniques for maintenance, specimens and food for the marine organisms are discussed. Several sources of specimens are included. (SA)

Describes an advanced undergraduate physics experiment which permits the measurement of ultrasound velocity and absorption in liquid systems. A description of the tasks the student is expected to perform is also included. (HM)

Describes a demonstration in which the local inertial frame of reference can be obtained in the laboratory by allowing a cage to fall freely without rotation under the influence of gravity. (HM)

Describes variations on atmospheric pressure demonstrations and some systematic studies. Demonstrations use steam, generated either externally or internally to the container, to sweep out residual air. Preferred vessels collapsed slowly. Demonstrations use plastic milk jugs set in layers of aluminum foil, pop bottles immersed in 4-L beakers…