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

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 1.5 x 10-2 N (which includes the small weight of the silder). The length of the silder is 30 cm. What is the surface tension of the film ?

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Force on the silder, F= 1.5 x 10-2 N

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