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An electric current flowing in a cable oscillates at a frequency of 60 Hz. Express the wavelength in meters and in kilometers.

Answer:

                Wavelength x Frequency (v) = Speed (c)

Wavelength x 60 Hz = 3.00 x 108 m/s

Wavelength = (3.00 x 108 m/s)/60 Hz = 5 x 106 m

Wavelength = 5 x 103 Km