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Hinrichsen, Peter F. – Physics Teacher, 2021
The variation of the period of oscillation of a pendulum with the amplitude is known as "circular error" to clockmakers, and can easily be observed even without modern laboratory instruments. There have therefore been many approximate formulae for the pendulum period as a function of the amplitude, but the simple equation due to Denman,…
Descriptors: Motion, Laboratory Equipment, Mathematical Formulas, Accuracy
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Williams, Hollis – Physics Education, 2021
We outline the physics involved in the use of scanning electron microscopy (SEM) and modernise the usual textbook treatment by explaining how one can now obtain high-quality images with non-conductive specimens. As a concrete example of an application in biology, we provide several magnification series of a flea obtained using SEM.
Descriptors: Spectroscopy, Physics, Quantum Mechanics, Optics
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Vera, Francisco; Ortiz, Manuel; Villanueva, Jaime; Horta-Rangel, Francisco Antonio – Physics Teacher, 2021
In this paper we explain how to build a very sensitive force table using 3D-printed parts. The key component of this apparatus is a simple sensitive pulley that, together with the other components, can be printed in one day (one hour per pulley, 17 hours for a complete three-pulleys table) at the cost of 160 g of plastic filament. This force table…
Descriptors: Computer Simulation, Printing, Laboratory Equipment, Design
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Johnson, Sara E.; West, Joseph K. – Journal of Chemical Education, 2021
Inert gas manifolds for the handling of air-sensitive materials are commonplace in the inorganic chemistry curriculum as well as in research laboratories specializing in inorganic and organometallic synthesis. Mercury bubblers are ubiquitously implemented for maintaining a positive internal pressure for air-free manifold systems, commonly known as…
Descriptors: Chemistry, Science Instruction, Science Laboratories, Laboratory Equipment
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Sadegh-cheri, Mohammad – Journal of Chemical Education, 2022
The accurate and precise transport of the small amounts of the liquid by the syringe pump is widely used in many fields. In this paper, an Arduino-based syringe pump is fabricated using the computer DVD (digital versatile disc) drive. For the fabrication of the syringe pump, low-cost electronic components such as an Arduino microcontroller, a…
Descriptors: Science Instruction, Laboratory Equipment, Video Technology, Computer Peripherals
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Farney, Michael Noble – Physics Teacher, 2022
Physics teachers are sometimes asked to teach an astronomy course for non-majors. One can't make that class dance and sing without the starry night, but on a brightly lit campus viewing deep sky objects may seem impossible. Hence instructors often opt for planetarium shows. However: 1) Planetariums aren't the real thing. 2) People living in large…
Descriptors: Physics, Science Instruction, Astronomy, Recreational Facilities
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Dean, Jacob; Rieland, Julie M.; Love, Brian J. – Journal of Chemical Education, 2021
Fiber materials and textiles are topics of much research and study today, with efforts being made to produce fibers that are stronger, more durable, more breathable, and better for the environment. However, the production of fibers at the laboratory scale is uncommon and difficult past the prototype phase, and to a commercial fiber production…
Descriptors: Textiles Instruction, Chemistry, Laboratory Equipment, COVID-19
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Maurye, Praveen; Basu, Arpita; Jana, Chayna; Devi, Manoharmayum Shaya; Kumari, Kavita; Naskar, Malay – Biochemistry and Molecular Biology Education, 2022
Gel electrophoresis (GE) is the most preferred and adapted technique for the separation and identification of biological molecules like proteins/peptides and nucleic acids from diverse types of organisms. All over the world, researchers, educators, and students aspiring to work in biochemistry and molecular biology disciplines use the…
Descriptors: High School Students, Biochemistry, Molecular Biology, Laboratory Procedures
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Haertel, Hermann – Physics Teacher, 2022
The question of how the processes around the Faraday generator with its rotating magnet should be interpreted has been controversial since its discovery by Faraday. Does the magnetic field rotate together with the rotating magnet or does it remain stationary? Furthermore, does one only need Faraday's flux law to interpret inductive processes, or…
Descriptors: Science Instruction, Physics, Laboratory Equipment, Magnets
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Lunelli, Bruno; Baroncini, Massimo – Journal of Chemical Education, 2020
The design and operation of an inverted cone, scalable vapor condenser, drawing cooling air from beyond the boundary layer and optionally working as a part of a gastight setup, are described and discussed. Besides its main use as a reflux condenser, it can also be used in one-plate distillations.
Descriptors: Chemistry, Science Activities, Laboratory Experiments, Laboratory Equipment
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Olson, Don – Physics Teacher, 2021
Most physics teachers have observed the majestic swings of a monumental pendulum at a science museum and have watched long enough to see the plane of oscillation slowly changing direction as Earth turns. The purpose of Don Olson's article is to describe visits to Paris sites related to Jean Bernard Léon Foucault (1819-1868), with a special focus…
Descriptors: Motion, Mechanics (Physics), Scientists, Laboratory Equipment
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Birchall, Lee T.; Shehata, Sara; Serpell, Christopher J.; Clark, Ewan R.; Biagini, Stefano C. G. – Journal of Chemical Education, 2021
The thermal equilibration of himic anhydride [IUPAC (2-"endo,"3-"endo")-bicyclo[2.2.1]hept-5-ene-2,3-dicarboxylic acid anhydride] to (2-"exo,"3-"exo")-bicyclo[2.2.1]hept-5-ene-2,3-dicarboxylic acid anhydride and subsequent recrystallization of the "exo"-product can be performed as a standard…
Descriptors: Organic Chemistry, Scientific Concepts, Undergraduate Students, Laboratory Experiments
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Moon, Su Jin; Chen, Yu; Lee, Jiwon; Jung, Pyung Kang; Cho, Youngsaeng; Kim, Jung Bog – Physics Education, 2021
Students are well aware that when an electric current flows through a light bulb, it glows. As their grade increases, they have understood that electric current flows because electric charges move. Since the transfer of electric charges is not visible, students have many cognitive difficulties in understanding this process, and teaching materials…
Descriptors: Physics, Visualization, Energy, Light
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Markwick, Andy – School Science Review, 2021
This article introduces a range of ways to engage students in microscopy, from investigating water droplet lenses to using low-cost, highly adaptable instruments that can be extremely effective inside and outside the classroom.
Descriptors: Learning Activities, Laboratory Equipment, Science Education, Foreign Countries
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Ye, Yiling; Tang, Chun; Zhang, Chengyang; Dong, Gang; Liu, Junyang; Hong, Wenjing – Journal of Chemical Education, 2021
Fabrication of molecular devices will meet the demands of the miniaturization of traditional electronic devices. Although microfabrication based on the complementary metal-oxide-semiconductor process can fabricate high-quality single-molecule devices, the cost is high, leading to a challenge to provide a hands-on experiment in the teaching…
Descriptors: Quantum Mechanics, Chemistry, Laboratory Equipment, Electronics
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