What will happen to the pitch of a sound as that sound’s source approaches an observer?Explain why this happens, based on what you have learned about wave properties.

1. Distinguish between constructive and destructive interference. Please use 3 content related sentences.

2. Explain how surface waves can have characteristics of both longitudinal waves and transverse waves.

3. A lifeguard on a beach observes that waves have a speed of 2.60 m/s and a distance of 2.50m between wave crests. What is the period of the wave motion?

4. What will happen to the pitch of a sound as that sound’s source approaches an observer?Explain why this happens, based on what you have learned about wave properties.

5. If a musical instrument such as a trumpet or flute is “flat”, should the pipe be lengthened or shortened? Explain with at least 2 content related sentences.

6. A train is moving at 23 m/s due east when it sound sa blast on its horn, frequency = 164 Hz.What frequency is heard by the driver of a car moving due east at 15 m/s along a road parallel to the tracks? Use 343 m/s for the speed of sound.Please show all work.