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?

`3xx10^(-3) Nm^(-1)`

`2xx10^(-5) Nm ^(-1)`

`4xx10^(-4) Nm^(-1)`

`2.5 xx10^(-2) Nm^(-1)`

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