Direction: Read, analyze and solve the following word problems. 1. If a lightning occurred exactly 1 mile from your location, how many seconds will it take for the sound waves created by the thunder to reach your ears at 343 m/s? 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=31.C) DEPART 4. Two trains are moving away from each other. The first train travels at 180 kph while the second, 195 kph. The first train emits a sound of frequency 970 Hz. What is the frequency of the sound perceived by a passenger in the second train? 5. Two cars approach each other at different velocities. To warn the other driver, the driver on the first car (v=85 kph) blows his horn (f=750 Hz). After the driver on the first car's horn die out, the second driver blows his horn (f=845 Hz) and the driver from the first car perceives a sound with a frequency of 875 Hz. (a) What is the velocity of the second car? (b) What is the frequency of sound perceived by the second driver when the driver in the first car blew his horn