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  4. A stretched string has linear density, μ=525 g / m and is under tension, T=45 N. A sinusoidal wave with frequency, f=120 Hz and amplitude 8.5 mm is sent along the string from one end. The wave speed is :

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Q. A stretched string has linear density, $\mu=525\, g / m$ and is under tension, $T=45\, N$. A sinusoidal wave with frequency, $f=120\, Hz$ and amplitude $8.5\,mm$ is sent along the string from one end.
The wave speed is :

Waves

Solution:

Wave speed $v=\sqrt{\frac{T}{\mu}}=\sqrt{\frac{45}{(0.525)}}=925\, m s ^{-1}$