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. Please use 3 content related sentences

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

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. Please use 3 content related sentences.

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.