momzsons85601 momzsons85601

06-02-2024
Physics

contestada

A paper disc of radius r, from which a hole of radius r is cut out, is floating on a liquid with surface tension T. The weight of the paper is balanced by the surface tension. What is the density of the liquid?

a) 2T/r
b) T/r
c) T/2r
d) r/T

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