Alternating Current Circuits and Electromagnetic Waves225(b) For the FM band, 8min6max3.0010 m s2.78 m10810 Hzcfλ×===×8max6min3.003.4 m88cf×=×21.52The transit time for the radio wave is 34810010 m3.3310s0.333 ms3.00RRdtc−×= ×=×and that for the sound wave is 33.0 m8.710s8.7 ms343 m ssssounddtv−=× =Thus, the radio listeners hear the news 8.4 ms before the studio audience because radio waves travel so much faster than sound waves. 21.53If an object of mass mis attached to a spring of spring constant k, the natural frequency of vibration of that system is
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