<span>The multiple reflection of a single sound wave is echo</span>
Answer:
2.93 m (which agrees with answer "C" on the list)
Explanation:
Recall that the speed of the wave equals the product of the wave's length times its frequency. Therefore, the wavelength is going to be the quotient of the speed of the signal divided its frequency:
Wavelength = 2.997 10^8 / 1.023 10^8 = 2.93 m
A time-varying magnetic field can be caused by fluctuating electric fields.
(t) = 2t = 1.22 sec. I believe ...
