Text-book of general physics, for the use of colleges and scientific schools (1899)
Hastings, Charles Sheldon · Boston: Ginn & company · leaf 152
Hue ah in order to keep the him stretched,measure of the surface tension isthen defined as the force per unitwidth of the film. i.e. The .4 a. B ao F^- D bFig. 101. Suppose the film now to be bentso as to form a portion of a cylin-drical surface of radius r, as in Fu?. 102. and that the forces FF… … fl] X= 2Fsme = 2F OH~K0 After dividing both sides ofthis equation by AJj. the breadthof the film, equation 1 may bewritten X _ 1 F__T i2) 2~<7H-AD~KO A£>~ < If. now. the dimensions of thefilm be made smaller and smaller,it is evident that 2 >xR • AJj approaches the area of the film,and…
Physics
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