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  4. Equation of a standing wave is expressed as y=2 , A sinω t cos kx. In this equation, quantity ω / k represents.

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Q. Equation of a standing wave is expressed as $y=2\,, A \sin\omega \,t\, \cos kx$. In this equation, quantity $\omega / k$ represents.

Solution:

Equation of component waves are
$y=A \sin (\omega t-k x)$ and $y=A \sin (\omega t+k x)$
So speed of component wave is $\left(\frac{\omega}{k}\right)$.