The velocity the wave was traveling at before the transmitter converts it to a sound wave is 3.0 x 10⁸ m/s.
The velocity of waves is the rate of change of the wave's displacement with time.
The velocity of waves is determined by taking the product of the wave's frequency and wavelength.
v = fλ
v = 13,000 x 23,076
v = 3.0 x 10⁸ m/s.
Thus, the velocity the wave was traveling at before the transmitter converts it to a sound wave is 3.0 x 10⁸ m/s.
Learn more about velocity of waves here: brainly.com/question/13867834