Question

If the force FF needed to move the wire in the given Fig. is 3.4×103 N3.4 \times 10^{-3} \mathrm{~N}, calculate the surface tension  γ ~\gamma~ of the enclosed fluid. Assume  =0.070 m~\ell=0.070 \mathrm{~m}.

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Concept:\textbf{Concept:}

The surface tension in the U-shaped wire apparatus in Figure 13-35 can be described by the equation:

γ=F2\begin{gather} \gamma = \dfrac{F}{2 \ell} \end{gather}

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