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This article was originally published as:

de Berg, K. C. , & Greive, C. E. (1999). Understanding the siphon: An example of the development of pedagogical content knowledge using textbooks and the writings of early scientists. Australian Science Teachers Journal, 45(4), 19.


A general explanatory principle for determining whether fluid will flow or will not flow from a siphon is developed and discussed after a consideration of the explanations provided by textbooks and the writings of Blaise Pascal.


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