A Transverse Periodic Wave Is Represented by the Equation Y(x

A transverse periodic wave is represented by the equation y(x, t) = 2.50 cm cos(2,500 rad/s t − 15.0 m⁻¹ x) . What are the wavenumber k and direction of propagation of the wave?

A) 15.0 m⁻¹; traveling in the − x direction
B) 15.0 m⁻¹; traveling in the + x direction
C) 30.0 m⁻¹; traveling in the + y direction
D) 30.0 m⁻¹; traveling in the − y direction
E) 45.0 m⁻¹; traveling in the + x direction

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