1. Questions About resonances and Sound waves

2. A sound wave travels from air into water. What will change due to the increase in speed? a. The wavelength and frequency will increase. b. The frequency will increase. c. The wavelength will increase. d. Wavelength and frequency will stay the same. Answer: c

3. Speed of sound in air 340 m/s air water Speed of sound in water 1400 m/s Detects same number of pulses per Second as have been emitted in air Speaker, f

4.   Frequency stays the same   Wave length changes

5. The speed of sound in air depends on the: a)Wavelength b)Frequency c)temperature d)amplitude Answer: c

6. Consider two organ pipes of the same length. A is closed, B is open. Which one will have the higher fundamental?  a) A  b) B  c) they have the same fundamental A B Answer: b

7. Consider two organ pipes of the same length. A is closed, B is open. Which one will have the higher second overtone?  a) A  b) B  c) they have the same second overtone A B Answer: b

8. Which of the following represents the spectrum of a pipe with one end closed? A B C D Answer: A

9. If a string is plucked in the center, a sound is produced. What is true for this sound? a)All harmonics can be found in the sound. b)Only the fundamental will ring. c)Only the even harmonics will contribute. d)Only the odd harmonics will contribute. Answer: d, only the harmonics that do not have a node in the center