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March 27, 2017

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A horizontal wire is held taut by a mass M hanging from its end over a pulley. A harmonic wave of wavelength is produced on the wire by a 52 Hertz vibration. If the mass of the density of the wire is 8.0 x 10^-3 kg/m, what is M?

  • Physics - ,

    λ=v/f
    v=λ•f

    T=m₀•v² = m₀• (λ•f)²,
    T=M•g,
    m₀• (λ•f)²=Mg,
    M= m₀• (λf)²/g =
    =8•10⁻³(1.8•52)²/9.8 =7.15 kg

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