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50 Years of ERIC
50 Years of ERIC
The Education Resources Information Center (ERIC) is celebrating its 50th Birthday! First opened on May 15th, 1964 ERIC continues the long tradition of ongoing innovation and enhancement.

Learn more about the history of ERIC here. PDF icon

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Velocity of Sound in Solids.
Peer reviewed Peer reviewed
Frank, Michael T.; Kluk, Edward – Physics Teacher, 1991
Presents experiments to measure the velocity of sound through metals and other amorphous materials. Describes the equipment used to make the measurements and the possibility of interfacing with a microcomputer. (MDH)
Descriptors: Acoustics, Computer Uses in Education, High Schools, Laboratory Equipment
A Cycloid Race.
Peer reviewed Peer reviewed
Hoffman, Dale T. – Physics Teacher, 1991
Discusses a misconception about the cycloid that asserts the final point on the path of shortest time in the "Brachistochrone" problem is at the lowest point on the cycloid. Uses a BASIC program for Newton's method to determine the correct least-time cycloid. (MDH)
Descriptors: High Schools, Mathematical Formulas, Mathematical Models, Misconceptions
Chaos and the Simple Pendulum.
Peer reviewed Peer reviewed
De Jong, Marvin L. – Physics Teacher, 1992
Studies the simple dynamical system of the pendulum and the chaotic behavior that occurs when the pendulum is both damped and driven. Provides an algorithm and BASIC program for the numerical solution to the differential equations encountered in the discussion. (MDH)
Descriptors: Algorithms, Chaos Theory, Computer Assisted Instruction, Differential Equations