1. Sound Quiz 1

2. 1. What type of wave is sound? A.Transverse B.Longitudinal C.Surface D.Electromagnetic 2

3. 2. What type of medium transmits sound best? A.Gases like air B.Water C.Elastic solids like steel D.Viscous liquids like oil 3

4. 3. The speed of sound depends on what? A.The energy carried by the wave B.The frequency of the wave C.The amplitude of the wave D.The properties of the medium 4

5. 4. A sound of higher frequency than humans can hear is called A.Ultrasonic B.Infrasonic C.Supersonic D.Subsonic 5

6. 5. The part of a longitudinal wave that corresponds to the trough of the transverse wave is called what? A.A compression B.A decompression C.A rarefaction D.A refraction 6

7. 6. As a longitudinal wave passes through a medium, the particles are vibrated A.Parallel to the direction of wave travel B.Perpendicular to the direction of wave travel C.Obliquely to the direction of wave travel D.Randomly 7

8. 7. The property of air that most affects the speed of sound is A.The density of the air B.The humidity C.The temperature D.The barometric pressure 8

9. 8. When a sound source is approaching a listener, the frequency heard is A.Greater than the natural frequency B.Less than the natural frequency C.Equal to the natural frequency D.unpredictable 9

10. 9. The property of the wave that determines the pitch of the sound is the A.Amplitude B.Wavelength C.Phase D.Frequency 10

11. 10. The fundamental wavelength of a vibrating string is A.Equal to the length of the string B.Twice the length of the string C.Half the length of the string D.4 times the length of the string 11

12. 11. An open ended tube resonator produces which harmonics? A.Only the even numbered harmonics B.Only the odd numbered harmonics C.All the harmonics D.Only the first four harmonics 12

13. 12. A closed ended tube can produce which harmonics? A.Only the even numbered harmonics B.Only the odd numbered harmonics C.All the harmonics D.Only the first four harmonics 13

14. 13. A vibrating string can produce what harmonics? A.Only the even numbered harmonics B.Only the odd numbered harmonics C.All the harmonics D.Only the first four harmonics 14

15. 14. The fundamental wavelength of a closed tube resonator is A.About 2 times the length of the tube B.About half the length of the tube C.Equal to the length of the tube D.About 4 times the length of the tube 15

16. 15. The fundamental wavelength of an open tube resonator is A.About 2 times the length of the tube B.About 4 times the length of the tube C.About half the length of the tube D.Equal to the length of the tube 16

17. 16. A string vibrates with a fundamental frequency of 100 Hz. If its tension is doubled, what will be the new frequency? A.50 Hz B.141 Hz C.200 Hz D.400 Hz 17

18. 17. A string vibrates with a fundamental frequency of 100 Hz. If its length is halved, what will be the new frequency? A.50 Hz B.141 Hz C.200 Hz D.400 Hz 18

19. 18. If two sources of sound emit frequencies of 100 Hz and 105 Hz respectively, what will be the frequency of the beats heard? A.5 Hz B.100 Hz C.102.5 Hz D.205 Hz 19

20. 19. The wave behavior responsible for the production of beats is A.Reflection B.Rectilinear propagation C.Refraction D.Interference 20

21. 20. If the distance between a listener and a sound source is tripled, by what factor is the intensity changed? A.1/9 B.1/3 C.3 D.9 21

22. Answers 1.B 2.C 3.D 4.A 5.C 6.A 7.C 8.A 9.D 10.B 11.C 12.B 13.C 14.D 15.A 16.B 17.C 18.A 19.D 20.A 22