Describes the construction and use of a nondriven pendulum that can be used in a classroom to demonstrate the rotation of Earth on its axis. (JRH)

Presents a simple experiment to compare the performance of the PASCO Introductory Dynamics System with that of an Ealing student air track. Discusses the relative advantages of both. Concludes that for a wide assortment of motion activities in a low friction environment, or studies of frictional forces, the PASCO Introductory Dynamics System is a…

A relatively simple opto-electronic setup is described that utilizes a cadmium sulphide (CdS) photoconductive cell to detect resonance of a stretched vibrating string or wire. The display may be either an oscilloscope or a frequency counter. Also describes an inexpensive socket for flanged-base light bulbs. (JN)

Describes the construction and use of homemade kaleidoscopes using film canisters and microscope slides. (JRH)

Describes the working of the Adiabatic Gas Law Apparatus, a useful tool for measuring the pressure, temperature, and volume of a variety of gases undergoing compressions and expansions. Describes the adaptation of this apparatus to perform isothermal measurements and discusses the theory behind the adiabatic and isothermal processes. (JRH)

Describes the design and use of a projectile motion apparatus to illustrate a variety of projective motion results typically discussed in an introductory course. They include independence of horizontal (constant speed) and vertical (constant acceleration) motions, parabolic path shape, and other types of motion. (JN)

Describes the experimental and theoretical details for constructing and calibrating an inexpensive, homemade liquid-lens refractometer. Measures refractive indices that are within the experimental errors discussed and close to the literature values. (JRH)

Describes an apparatus that can be used to illustrate the relationships that are necessary between the earth, the moon, and the sun, and the orbital tilts of these bodies to produce eclipses. (JRH)

Discussed are strobe photography, making a storage unit, improving a lecture-table meter, and making an electrical discharge tube. (RH)

Describes how to make an electroscope from aluminum soft drink or beer cans. Also describes several electrostatic experiments using the easily constructed apparatus. (JN)

This final article in the series on the fine-beam cathode-ray tube presents: (1) additional investigations; (2) an alternative method for the electron e/m and synchrotron radiation; and (3) two challenges to students (in a dialogue format) together with a lengthy discussion on synchrotron radiation sources. (DH)

Describes how to construct a thermometer from a ballpoint pen; how to illustrate standing waves with pocket combs; and various physics demonstrations using oval panty hose containers. (MLH)

Discusses the nature, resolution, focal length, and angle of a pinhole camera. Describes the development and some applications of the camera. Nineteen references are listed. (YP)