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Goodman, D. S.; Wells, J. E. – Physics Teacher, 2021
An electric motor converts electrical energy into mechanical work and an electric generator converts mechanical work into electrical energy. The symmetry between the motor and generator naturally leads to questions about creating a perpetual motion machine. The allure of this question has inspired textbook problems, physics education articles, and…
Descriptors: Engines, Energy, Science Instruction, Motion
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Lu, Y. J.; Nakahara, Hiroko; Bobowski, J. S. – Physics Teacher, 2020
This paper describes simple modifications to a demonstration Stirling engine that allows one to make quantitative measurements of the Stirling cycle. First, we describe measurements of the "P-V" diagram using an in-expensive pressure sensor and a common photogate. Then, as a supplement, the engine was run as a refrigerator by using a…
Descriptors: Science Instruction, Measurement Techniques, Engines, Demonstrations (Educational)
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Kaufman, Richard – European Journal of Physics Education, 2019
The first law of thermodynamics does not forbid heat engines with 100% thermodynamic efficiency; it is the second law of thermodynamics which states that heat engines cannot obtain 100% efficiency. Can the first law ever show this second law result? Yes. We show that the first law alone can show that some heat engines cannot achieve efficiencies…
Descriptors: Thermodynamics, Scientific Principles, Heat, Efficiency
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Tan, B. T. G. – Physics Teacher, 2019
With the rapid spread of high-speed railway technology, there is a resurgence of interest in trains and railways. The main propulsive engine for railways was the steam engine for over a century, which gave way to the diesel and electrical engines. The steam engine was crucial to the birth and development of the railway industry, and understanding…
Descriptors: Heat, Thermodynamics, Transportation, Scientific Concepts
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Neuenschwander, Dwight E. – Physics Teacher, 2020
Previous generations of physics students learned how common machines work, as evidenced by their textbook illustrations. Such understanding of machines that daily life depends on seems to be evaporating. In response, for two decades I have conducted an introductory physics "engine cadaver lab." It offers opportunities for hands-on…
Descriptors: Hands on Science, Physics, Science Instruction, Class Activities
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Eff-Darwich, Antonio – Physics Teacher, 2021
In this work, an easy-to-set-up demonstration about electromagnetic induction is presented, where a simple toy electric motor is transformed into a musical instrument. With this creative way to mix physics and music, it is expected to engage and motivate students to learn about the basic concepts of electromagnetism.
Descriptors: Science Instruction, Demonstrations (Educational), Energy, Magnets
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Al-Olimat, Khalid S. – IEEE Transactions on Education, 2022
Contribution: Project-based learning is a widely used learning approach that has proven itself effective in engineering education. This article describes a generalized model to teach undergraduate students the concepts of dc electric motors using project-based learning through a complete module that consists of modeling and simulation, and…
Descriptors: Engineering Education, Active Learning, Student Projects, Models
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Yeadon, Will; Quinn, Mark – Physics Education, 2021
We present a thermodynamics experiment suitable for first year undergraduate students employing Stirling Engines to create a demonstration of energy transformation and to measure the mechanical efficiency of such engines. Using an inexpensive transparent chambered Stirling Engine, students can connect concepts such as the theoretical…
Descriptors: Thermodynamics, Science Education, Physics, College Science
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Ivanov, Dragia; Nikolov, Stefan – Physics Education, 2019
In this article we consider a well-known simple, very accessible demonstration of surface tension with a small boat propelled by substances that change the surface tension of water. A simple quantitative evaluation is provided that matches well with experimental data. A modification to the experiment is proposed allowing it to continue for a long…
Descriptors: Science Instruction, Physics, Science Experiments, Molecular Structure
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Fukumoto, Hisao; Yamaguchi, Takashi; Ishibashi, Makoto; Furukawa, Tatsuya – IEEE Transactions on Education, 2021
Contribution: This article proposes a low-cost and mobile device-based learning support system for the stepper motor, which provides Web-based remote laboratory. This system allows young engineers to learn about rotational principles, control methods, and programming in stepper motors. Background: Familiarity with electrical machinery, such as…
Descriptors: Laboratory Training, Science Laboratories, Handheld Devices, Laboratory Equipment
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Nurtanto, Muhammad; Sofyan, Herminarto; Pardjono, Pardjono; Suyitno, Suyitno – International Journal of Evaluation and Research in Education, 2020
BNSP technical competence gets high legality on the side of the industry, while not all test participants can acquire it. Until now, studies that discuss relevant competency test models on automotive engine technology are still limited, not specific or even non-existent. The objective of this research is to produce a Competency Test Model for…
Descriptors: Auto Mechanics, Motor Vehicles, Skilled Occupations, Vocational Education
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Bednarek, Stanislaw – Physics Teacher, 2018
The most common type of homopolar motor comprises a cylindrical neodymium magnet, a battery, and a non-ferromagnetic frame rotating around the battery. Here, the author substituted a coiled spring for the frame. Due to this change, a new and intriguing effect emerges, the axial buzzing of the spring during its rotation. This paper describes the…
Descriptors: Magnets, Physics, Science Instruction, Scientific Concepts
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Baird, William H.; Secrest, Jeffrey; Padgett, Clifford – Physics Teacher, 2017
Although we may consider the power outlets in our homes to be nearly ideal voltage sources, a variety of influences in and around the home can cause departures from the nominal 60 Hz, 110-120 V root-mean-square (rms) of the North American grid. Even without instrumentation, we can see that a large motor starting from rest can be sufficient to…
Descriptors: Energy, Power Technology, Engines, Measurement Equipment
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Zhu, Lilin; Xiang, Gang – Physics Education, 2022
We report on the study of student difficulties regarding a heat engine in the context of a Stirling cycle by the method of measurement. An in-class test about a Stirling engine with a regenerator was taken by three classes, and the students were asked to perform one of the most basic activities--calculate the efficiency of the heat engine. Our…
Descriptors: Heat, Physics, Science Instruction, Engines
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Lund, Daniel; Dietz, Eric; Zou, Xueli; Ard, Christopher; Lee, Jaydie; Kaneshiro, Chris; Blanton, Robert; Sun, Steven – Physics Teacher, 2017
An essential laboratory exercise for our lower-division electromagnetism course involves the measurement of Earth's local magnetic field from the emf induced in a rotating coil of wire. Although many methods exist for the measurement of Earth's field, this one gives our students some practical experience with Faraday's law. The apparatus we had…
Descriptors: Research Design, Data Analysis, Engines, Science Education
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