Submitted by examrobotsa on Thu, 01/01/1970 - 05:30 A sound wave has frequency of 2 kHz and wavelength of 35 cm. If an observer is 1.4 km away from the source, after what time interval could the observer hear the sound?2 s 20 s0.5 s4 sstats: 0,72,192,72,88,56,48