9.17 A U-shaped wire is dipped in a soap solution

PHYSICS · Subjective · CBSE · Physics · Mechanical Properties of Fluids · Mechanical Properties of Fluids

Problem

9.17 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 \times 10^{-2} \mathrm{~N}

(which includes the small weight of the slider). The length of the slider is 30 cm . What is the surface tension of the film?