A wire is bent in the formof a U. shape and a sider of negligible mass is connecting the two verticalslides of the U-shape. This arrangement is dipped in to soap solutiona and lifted, a thin soap film is formed in the frame. It supports a weight of 2.0xx10^(-3)N. If the length of the slider is 40 cm, what is the surface tension of the film?

A wire is bent in the formof a U. shape and a sider of negligible mass

1.	A wire is bent in the formof a U. shape and a sider of negligible mass is connecting the two verticalslides of the U-shape. This arrangement is dipped in to soap solutiona and lifted, a thin soap film is formed in the frame. It supports a weight of 2.0xx10^(-3)N. If the length of the slider is 40 cm, what is the surface tension of the film?
Answer» <html><body><p></p>Solution :`W=2.0xx10^(-2)<a href="https://interviewquestions.tuteehub.com/tag/n-568463" style="font-weight:bold;" target="_blank" title="Click to know more about N">N</a>,l=40cm=0.4m` <br/> Upward <a href="https://interviewquestions.tuteehub.com/tag/force-22342" style="font-weight:bold;" target="_blank" title="Click to know more about FORCE">FORCE</a> <a href="https://interviewquestions.tuteehub.com/tag/due-433472" style="font-weight:bold;" target="_blank" title="Click to know more about DUE">DUE</a> to surface tesion `=Sxx2l` <br/> In equilibrium `W=Sxx2l` <br/> `S=W/(2l)=(2xx10^(-2))/(2xx0.4)=2.5xx10^(-2)Nm^(-1)`</body></html>