Describes a simple apparatus and provides instructions to do relative index of refraction measurements/calculations and to show mathematical relationships betwen indices when light travels from one liquid to another. A listing of a computer program (in BASIC) which will analyze data is available from the author. (JM)

Describes: (1) an apparatus which provides a simple method for measuring Stefan's constant; (2) a simple phase shifting circuit; (3) a radioactive decay computer program (for ZX81); and (4) phase difference between transformer voltages. (Author/JN)

Most of this report is concerned with describing the project and its activities and accomplishments during the first year of its existence. A major goal of the project is to produce units of curricula in which the computer can be used to enhance the teaching or learning of mathematics, the sciences, and other secondary school subjects. Thirty-one…

Discusses use of the VIC-20 microcomputers for laboratory interfacing. Topics considered include the game connections and use of: the ADC0809 A/D converter and timers with the VIC-20; the free-running mode of T1; and the pulse-counting mode of T2. Instructions and diagrams are provided. Descriptions of several programs are also provided. (JN)

Discusses determination of elliptical path of a satellite caught into orbit by the sun or earth; using microcomputer as signal generator (includes program listing); collision process; simple hysteresis loop using double beam CRO; method of demonstrating parallelogram of forces; measuring radius of electron beam curvature; and half-life of thorium…

Discusses dice model of exponential radionuclide decay; glancing and collinear perfectly elastic collisions; digital capacitance meter; use of top pan balance in physics; microcomputer calculation of gradient of straight line (includes complete Commodore PET computer program); Fresnel lenses; low-voltage radiant heater; Wheatssone's bridge used as…

Describes a system of interfacing allowing a range of signal conditioning and control modules to be connected to microcomputers, enabling execution of such experiments as: examining rate of cooling; control by light-activated switch; pH measurements; control frequency of signal generators; and making automated measurements of frequency response of…

Describes an electric writing experiment, food hygiene computer program (includes complete Commodore PET program listing), a simple battery holder, and activities using magnets. (JN)

Presents a computer program for analyzing diets, a game designed to supplement a topic on insects, a technique for demonstrating the role of ethene in fruit ripening, an apparatus for removing arthropods from soil samples, activities using cichlids, and an activity on bonds stabilizing protein structure. (JN)