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A u shaped wire is dipped in a soap solution and removed.The thin soap film formed between the wire and a light slider supports a weight of 1.5*10-2N.The l of the slider is 30cm.What is the surface tension of the film |
| Answer» A u shaped wire is dipped in a soap solution and removed.The thin soap film formed between the wire and a light slider supports a weight of 1.5*10-2N.The l of the slider is 30cm.What is the surface tension of the film | |