A 100 Hz electromagnetic wave has length of about 1,862.82 miles.
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Period = 1 / frequency = 1/100 = 0.01 second.
The period of an 8000 Hz sine wave is 0.125 milliseconds. (1/8000)
The formula for a wave in this case is: speed = frequency x wavelength. Since Hz = 1/second, the answer will be in meter/second.
10 Hz
0.02