Snow, Benjamin Warner, 1860- · Madison, Wis. · leaf 222
ynes per ceiitimeter.2 CD If the frame has parallel arms, as in Fig. 142, the wire CD islifted through the height CA, and each surface of the film incontracting has done an amount of work equal to T CD-CA. The surface, hoAvever, has now decreasedin extent by the area CDCA; and if Erepresents the… … IT TJ D Fig. 142. Measure-ment of surfaceenergy. or E = T. -^0 In other Avords, the energy of the film per unit of area is nu-merically equal to the tension of the film per unit of length. .^^
Physics
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