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Showing 1 to 15 of 179 results Save | Export
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Dziob, Daniel; Cepic, Mojca – Physics Education, 2020
Heat transfer is a phenomenon well known from everyday life. It is intuitively connected to the properties of materials, that is, to the physics concept of thermal conductivity relevant for cooking or maintaining the constant temperature in rooms, even without being familiar to the underlying physics. However, measurement of thermal conductivity…
Descriptors: Science Instruction, Physics, Heat, Thermodynamics
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Owen, Bradley A.; Starvaggi, Nicholas C.; Mensah, Taylor I.; Mills, Isaac N. – Journal of Chemical Education, 2020
Thermal conductivity is generally the tool of choice for quantification of fixed gases, particularly lighter-than-air gases. Unfortunately, gas chromatography-thermal conductivity detectors (GC-TCDs) are difficult to introduce in first- and second-year chemistry courses where the cost and number of instruments, as well as the space required, is…
Descriptors: Science Instruction, College Science, Undergraduate Study, Science Laboratories
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Batlolona, John Rafafy; Souisa, Haryo Franky – International Journal of Evaluation and Research in Education, 2020
This paper tells about the mental model of prospective scholars on the topic of temperature and heat. The purpose of this research is to improve students' mental model by using problem based learning (PBL) model. The number of samples in the study amounted to 72 students with two different classes. The results of the study showed that, (1) the…
Descriptors: Problem Based Learning, Schemata (Cognition), Scientific Concepts, Instructional Effectiveness
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Talbot, Christopher; Vickneson, Kishanda – School Science Review, 2013
The aim of this "Science Note" is to describe how to test the electron-sea model to determine whether it accurately predicts relative electrical conductivity for first-row transition metals. In the electron-sea model, a metal crystal is viewed as a three-dimensional array of metal cations immersed in a sea of delocalised valence…
Descriptors: Science Instruction, Energy, Metallurgy, Scientific Principles
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Shang, Hao – Journal of Chemical Education, 2021
Here, we present an interdisciplinary educational project intended for high school chemistry that is focused on the establishment of a mathematical model to describe the relationship between conductivity and concentration, while linking chemistry to mathematics with the help of computer software. The project was designed to help high school…
Descriptors: Science Instruction, Chemistry, Teaching Methods, Mathematics Instruction
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Lu, Yang; Santino, Luciano M.; Acharya, Shinjita; Anandarajah, Hari; D'Arcy, Julio M. – Journal of Chemical Education, 2017
The design and fabrication of functional scientific instrumentation allows students to forge a link between commonly reported numbers and physical material properties. Here, a two-point and four-point probe station for measuring electrical properties of solid materials is fabricated via 3D printing utilizing an inexpensive benchtop…
Descriptors: Energy, Electronics, Energy Education, Power Technology
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Vollmer, M.; Möllmann, K. P. – Physics Education, 2016
The conduction of electricity is an important topic for any basic physics course. Issues of safety often results in teacher demonstration experiments in front of the class or in extremely simple though--for students--not really fascinating (not to say boring) hands on activities for everybody using 1.5 V batteries, cables and light bulbs etc. Here…
Descriptors: Energy, Physics, Science Instruction, Science Experiments
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Smith, K. Christopher; Garza, Ariana – Journal of Chemical Education, 2015
This paper describes a student designed experiment using titrations involving conductivity measurements to identify unknown acids as being either HCl or H[subscript 2]SO[subscript 4], and to determine the concentrations of the acids, thereby improving the utility of standard acid-base titrations. Using an inquiry context, students gain experience…
Descriptors: Chemistry, Measurement, Inquiry, Active Learning
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Set, Seng; Kita, Masakazu – Journal of Chemical Education, 2014
This paper describes the development of a simple handmade conductivity measurement apparatus based on a Kohlrausch bridge with inexpensive materials. We have examined the reliability of this apparatus with standard solutions and then measured juices of vegetables and fruits as well as a sports drink. Comparisons to total alkali content as…
Descriptors: Science Instruction, Laboratory Equipment, Measurement Equipment, Food
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Chiaverina, Chris – Physics Teacher, 2014
We usually think of glass as a good electrical insulator; this, however, is not always the case. There are several ways to show that glass becomes conducting at high temperatures, but the following approach, devised by Brown University demonstration manager Gerald Zani, may be one of the simplest to perform.
Descriptors: Science Experiments, Structural Elements (Construction), Climate, Energy
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Seng, Set; Shinpei, Tomita; Yoshihiko, Inada; Masakazu, Kita – Journal of Chemical Education, 2014
The precise measurement of conductivity of a semiconductor film such as polypyrrole (Ppy) should be carried out by the four-point probe method; however, this is difficult for classroom application. This article describes the development of a new, convenient, handmade conductivity device from inexpensive materials that can measure the conductivity…
Descriptors: Science Instruction, Laboratory Equipment, Secondary School Science, High School Students
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Alvarado, S.; Marin, E.; Juarez, A. G.; Calderon, A.; Ivanov, R. – European Journal of Physics, 2012
The implementation of an automated system based on the hot-wire technique is described for the measurement of the thermal conductivity of liquids using equipment easily available in modern physics laboratories at high schools and universities (basically a precision current source and a voltage meter, a data acquisition card, a personal computer…
Descriptors: Physics, Computer Uses in Education, Measurement Techniques, Data Processing
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Marzluff, Elaine M.; Crawford, Mary A.; Reynolds, Helen – Journal of Chemical Education, 2011
Substitution reactions, a central part of organic chemistry, provide a model system in physical chemistry to study reaction rates and mechanisms. Here, the use of inexpensive and readily available commercial conductivity probes coupled with computer data acquisition for the study of the temperature and solvent dependence of the solvolysis of…
Descriptors: Organic Chemistry, Science Instruction, Scientific Principles, Heat
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Compton, Owen C.; Egan, Martin; Kanakaraj, Rupa; Higgins, Thomas B.; Nguyen, SonBinh T. – Journal of Chemical Education, 2012
Periodic conductivity trends are placed in the scope of lithium-ion batteries, where increases in the ionic radii of salt components affect the conductivity of a poly(ethyleneoxide)-based polymer electrolyte. Numerous electrolytes containing varying concentrations and types of metal salts are prepared and evaluated in either one or two laboratory…
Descriptors: Chemistry, Plastics, Undergraduate Students, College Science
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Nyasulu, Frazier; Stevanov, Kelly; Barlag, Rebecca – Journal of Chemical Education, 2010
Using a conductivity sensor, a temperature sensor, and a datalogger, fundamental factors that affect conductivity are explored. These factors are (i) concentration, (ii) temperature, (iii) ion charge, and (iv) size and or mass of anion. In addition, the conductivities of a number of other solutions are measured. This lab has been designed to…
Descriptors: Fundamental Concepts, Climate, Scientific Concepts, Laboratories
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