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7 September, 22:25

A 15m long wire is placed horizontally on the surface of a liquid and is gently pulled up with the force of 60N to keep the wire in equilibrium. what is the surface tension of the liquid?

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  1. 8 September, 00:17
    0
    2 N/m

    Explanation:

    Given that

    The length of a wire, l = 15 m

    Force on the wire, F = 60 N

    Surface tension on the liquid, S = ?

    The formula to solve this problem is given as

    F = S * 2 L, where

    F = force on the liquid

    S = surface tension of the liquid

    L = length of the wire

    On substituting the values of each, we have

    60 = S * (2 * 15)

    S = 60 / 30

    S = 2 N/m

    Thus, we can say then, that the surface tension of the liquid is 2 N/m
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