1. If a lightning occurred exactly 1 mile from your location, how many seconds will it take created by the thunder to reach your ears at 343 m/s? the sound waves 2. A sound has a frequency of 230 Hz. What is the velocity of this sound if it has a wavelength of 46 cm? 3. A car travelling at a velocity of 12.00 m/s blows its horn (f = 380 Hz). (a) What will be the frequency of the sound of the horn for an observer at rest if the car is travelling toward the observer? (b) if the car is receding away from the observer? (T=31C)