A U-shaped wire is dipped in a soap solu...

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

`2.5xx10^-2` N/m

`5xx10^-3` N/m

`6xx10^-4` N/m

`9xx10^-2` N/m

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