(II) The surface tension of a liquid can be determined by
Chapter 10, Problem 69P(choose chapter or problem)
Problem 69P
(II) The surface tension of a liquid can be determined by measuring the force F needed to just lift a circular platinum ring of radius r from the surface of the liquid. (a) Find a formula for γ in terms of F and r. (b) At 30°C, if F = 6.20 x 10-3 N and r = 2.9 cm, calculate γ for the tested liquid.
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