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13 December, 13:22

A steel piano string of mass per unit lenght 4*10-⁴kgm-¹ was struck, if the speed of the sound on the string is 300ms-¹. Calculate the tension ...

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  1. 13 December, 16:54
    0
    36 N

    Explanation:

    Velocity of a standing wave in a stretched string is:

    v = √ (T/ρ),

    where T is the tension and ρ is the mass per unit length.

    300 m/s = √ (T / 4*10⁻⁴ kg/m)

    T = 36 N
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