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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