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| College Science | 3 |
| Higher Education | 3 |
| Physics | 3 |
| Thermodynamics | 3 |
| Heat | 2 |
| Instructional Materials | 2 |
| Science Education | 2 |
| Air Conditioning | 1 |
| Energy | 1 |
| Instruction | 1 |
| Mathematical Models | 1 |
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Source
| American Journal of Physics | 3 |
Author
| Leff, Harvey S. | 3 |
| Teeters, William D. | 1 |
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Peer reviewedLeff, Harvey S. – American Journal of Physics, 1977
Shows that the entropy change during the temperature equilibration of an isolated collection of systems which may exchange heat (but not work) energy is positive when the constant-volume heat capacity of each system is a non-negative function of the temperature. (MLH)
Descriptors: College Science, Higher Education, Instructional Materials, Physics
Peer reviewedLeff, Harvey S.; Teeters, William D. – American Journal of Physics, 1978
Describes the relationship existing between coefficient of performance (COP) and energy efficiency ratio (EER) in air conditioning units and introduces new efficiency parameters measured relative to the energy extracted from the primary energy source. (SL)
Descriptors: Air Conditioning, College Science, Energy, Heat
Peer reviewedLeff, Harvey S. – American Journal of Physics, 1978
Presents a simple model whereby the work per cycle done on an external agent, and a sand reservoir, by a reversible heat engine can be analyzed explicitly. (Author/SL)
Descriptors: College Science, Heat, Higher Education, Instructional Materials
