A travelling wave is described by the equation $y(x,t) = [0.05\sin (8x - 4t)]$ m The velocity of the wave is : [all the quantities are in SI unit]

Question

A travelling wave is described by the equation

$y(x,t) = [0.05\sin (8x - 4t)]$ m

The velocity of the wave is : [all the quantities are in SI unit]

$\mathrm{4~ms^{-1}}$

$\mathrm{2~ms^{-1}}$

$\mathrm{8~ms^{-1}}$

$\mathrm{0.5~ms^{-1}}$

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