3. Calculate the work of adhesion for water, glycerin and benzene, which wet fluoroplastic. The surface tension (at the interface with air) of water, glycerin and benzene, respectively, is 71.96; 63.2; 28.9 mJ/m2, and the contact angles are 108, 100 and 46. Arrange the indicated substances in increasing order of their ability to wet fluoroplastic
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