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Ivanov, Dragia; Nikolov, Stefan – Physics Education, 2019
In this article we consider the well-known demonstration of friction by two interleaved books. We consider a factor that has not been part of the popular explanation--atmospheric pressure. We provide three control experiments to demonstrate the role of atmospheric pressure in the two-book experiment and an additional simple demonstration of the…
Descriptors: Science Instruction, Scientific Concepts, Teaching Methods, Books
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Ivanov, Dragia; Nikolov, Stefan – Physics Education, 2016
In this paper we present a novel way to demonstrate the Hall effect and study some of its main properties using basic materials and easily obtainable measuring devices.
Descriptors: Physics, Scientific Concepts, Scientific Principles, Science Experiments
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Ivanov, Dragia; Nikolov, Stefan; Petrova, Hristina – Physics Education, 2014
In this paper we present three different methods for testing Bernoulli's law that are different from the standard "tube with varying cross-section." They are all applicable to high-school level physics education, with varying levels of theoretical and experimental complexity, depending on students' skills, and may even be…
Descriptors: Science Instruction, Physics, Scientific Principles, Secondary School Science