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Parachor is a quantity defined according to the formula:

P = γ1/4 M / d

where γ1/4 is the fourth root of surface tension, M is the molar mass, and d is the density. Parachor "has been used in solving various structural problems".[1]


  1. ^ O. Exner. "Conception and Significance of the Parachor." Nature, 1 December 1962, vol. 196, pages 890-1.