Methodological notes

A drop jumps to weightlessness: a lecture demo

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Department of Physics, Korolenko Glazov State Pedagogical Institute, ul. Pervomaiskaya 25, Glazov, 427600, Russian Federation

The paper discusses the lecture demonstration of the phenomenon in which a drop lying on a solid unwettable substrate performs a jump when making the transition to weightlessness. An elementary theory of the phenomenon is given. A jump speed estimate is obtained for small and large drops. The natural vibrational frequency of a flying drop is determined. A full-scale model of Einstein's lift is described. Experimental and theoretical results are found to agree satisfactorily.

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Keywords: lecture demonstrations, liquid drop, transition to weightlessness, natural oscillations, Einstein's lift
PACS: 01.50.My, 47.55.D− (all)
DOI: 10.3367/UFNe.2016.04.037815
Citation: Mayer V V, Varaksina E I, Saranin V A "A drop jumps to weightlessness: a lecture demo" Phys. Usp. 60 108–113 (2017)
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Received: 23rd, April 2016, 26th, April 2016

Оригинал: Майер В В, Вараксина Е И, Саранин В А «Лекционные демонстрации прыжка капли в невесомость» УФН 187 119–124 (2017); DOI: 10.3367/UFNr.2016.04.037815

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