A U -shaped wire is dipped in a soap solution, and removed . The thin soap film formed between the wire and the light slider supports a weight of 1.5xx10^(-2)N (which includes the small weight of the slider ).The length of the slider is 30 cm . What is thesurface tension of the film ?

A U -shaped wire is dipped in a soap solution, and removed . The thin

1.	A U -shaped wire is dipped in a soap solution, and removed . The thin soap film formed between the wire and the light slider supports a weight of 1.5xx10^(-2)N (which includes the small weight of the slider ).The length of the slider is 30 cm . What is thesurface tension of the film ?
Answer» SOLUTION :Here , W=F 2Sl =W `S=(W)/(2l)` `=(1.5xx10^(-2))/(2xx0.3)` `=2.5xx10^(-2)NM^(-1)`