A longitudinal wave is represented by the equation z(z, t) = -2.0 cm sin(1,200 rad/s t - 20 z). Another longitudinal wave is represented by the equation z(z, t) = +2.0 cm sin(1,200 rad/s t + 20z). What is the equation that represents the superposition of the two waves?

A. z(z, t) = +4.0 cm cos(1,200 rad/s t) cos(20z)

B. z(z, t) = +4.0 cm cos(1,200 rad/s t) sin(20z)

C. z(z, t) = +4.0 cm cos(1,200 rad/s t) cos(20z)

D. z(z, t) = -2.0 cm cos(1,200 rad/s t) sin(20z)


B. z(z, t) = +4.0 cm cos(1,200 rad/s t) sin(20z)

Physics & Space Science

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