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The equation of a stationary wave is giv...

The equation of a stationary wave is given by `y=6sin.(2pix)/(3)cos40pit`. Where y and x are in cm and time t is in s. In respect to the component progressive waves, calculate
(a) amplitude (b) wavelength (c ) frequency

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The standard equation of a stationary wave is
`y=2asin.(2pi)/(lambda)xcos.(2pi)/(lambda)t`.
(a) `2a=6 implies a=3cm` (b) `(2pi)/(lambda)=(2pi)/(3)implies lambda=3cm`
(c ) `(2pi)/(T)=2piupsilon=40piimpliesupsilon=20=Hz`.
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