**9)**

For a wave moving in the positive x-direction:

${\mathbf{y}}{\mathbf{(}}{\mathbf{x}}{\mathbf{,}}{\mathbf{t}}{\mathbf{)}}{\mathbf{=}}{\mathbf{Asin}}{\mathbf{(}}{\mathbf{kx}}{\mathbf{-}}{\mathbf{\omega t}}{\mathbf{)}}$

A transverse harmonic wave travels on a rope according to the following expression:

y(x,t) = 0.12sin(2.1x + 17.6t)

9) In what direction is the wave traveling?

10) On the same rope, how would increasing the wavelength of the wave change the period of oscillation?

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