Lecture14_Ch13_Part2

Lecture14_Ch13_Part2 - 1 Lecture 14 Waves and Sounds...

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Unformatted text preview: 1 Lecture 14: Waves and Sounds Lecture 14: Waves and Sounds - Chapter 13 Chapter 13 – Part 2 Part 2 Lecture 14: Waves and Sounds Lecture 14: Waves and Sounds - Chapter 13 Chapter 13 – Part 2 Part 2 Plan Plan 1. 1. Waves propagation: reflection and Waves propagation: reflection and refraction refraction 2. 2. Interaction of waves: interference Interaction of waves: interference 3. 3. Standing waves Standing waves 4. 4. Waves produced by moving objects Waves produced by moving objects 5. 5. Forced vibrations Forced vibrations 6. 6. Natural frequencies and Resonances Natural frequencies and Resonances Chapter 13: Homework • Key Terms • Review Questions: 1, 2, 4, 5, 6, 7, 8, 15, 16, 18 Exercises: 1 2 4 5 8 1 • Exercises: 1, 2, 4, 5, 8, 11 • Problems: 1, 3, 6, 8 1. Waves Propagation Waves can be reflected and refracted . Sound: Well known sound wave reflection effect is an echo. Sound can be refracted if it passes through space areas in which it travels different speeds. Light: Light can be reflected and refracted. Reflection of waves 2 Law of Reflection The angle of incident sound is incident sound is equal to the angle of reflected sound Refraction of waves • Sound waves bend when parts of the wave travel at different speeds Warm air Pool air Warm air Warm air Pool air Sped of sound in dry cool air is 330m/s. For each degree rise Sped of sound in dry cool air is 330m/s....
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Lecture14_Ch13_Part2 - 1 Lecture 14 Waves and Sounds...

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