1. Question 1
The distance from equilibrium of a wave to the crest of the wave is called…

2. ANSWER
Amplitude

3. Question 2
The power of sound per area of sound is called…

4. ANSWER
Intensity

5. Question 3
What are the units for sound Intensity?

6. ANSWER
Watts per square meter

7. Question 4
The mathematical name for the shape of a wave is called a __________ wave.

8. ANSWER
sine

9. Since sound cannot travel in a vacuum it is called a(n)…
Question 5
Since sound cannot travel in a vacuum it is called a(n)…

10. ANSWER
Mechanical wave

11. What are the metric units used to measure frequency?
Question 6
What are the metric units used to measure frequency?

12. ANSWER
Hertz

13. The faster the sound moves through the air, …
Question 7
The faster the sound moves through the air, …
The colder the air must be.
The warmer the air must be.
The dryer the air must be.
The higher frequency sound it must be.

14. B) The warmer the air must be
ANSWER
B) The warmer the air must be

15. Question 8 What is the range of human hearing? 5 Hz-5,000 Hz

16. ANSWER
C) 20 Hz - 20,000 Hz

17. Question 9
What is the type of wave that vibrates perpendicular to its direction of travel? Hint: light, x-rays, radio waves fall into this category

18. ANSWER
Transverse waves

19. Question 10
What is the other name for a longitudinal wave?

20. ANSWER
Compression wave

21. In a longitudinal wave the area between compressions is called…
Question 11
In a longitudinal wave the area between compressions is called…

22. ANSWER
rarefaction

23. What is the symbol used for sound intensity level?
Question 12
What is the symbol used for sound intensity level?

24. ANSWER ß

25. Which two factors affect the speed of sound?
Question 13
Which two factors affect the speed of sound?
frequency and period
amplitude and wavelength
air temperature and humidity
wavelength and elasticity

26. C) Air temperature and humidity
ANSWER
C) Air temperature and humidity

27. The pitch of a sound depends on which of these?
Question 14
The pitch of a sound depends on which of these?
wavelength
amplitude
intensity
loudness
frequency

28. ANSWER
E) frequency

29. Question 15
Periodic motion of an object that results from a restoring force that is proportional to displacement is called…

30. Simple Harmonic Motion
ANSWER
Simple Harmonic Motion

31. Question 17
When sound waves bend due to a difference in air temperature it is called…
reflection
reverberation
echoing
refraction

32. ANSWER
D) refraction

33. Question 18
 Sound waves that are beyond the frequency range of human hearing are called _____________.

34. ANSWER
Ultrasonic

35. Question 19
If an object oscillates 20 complete cycles in 5 seconds, what is its period?

36. ANSWER
0.25 seconds

37. Sound intensity level (loudness) is measured in units called...
Question 20
Sound intensity level (loudness) is measured in units called...

38. ANSWER
Decibels

39. Question 21
The special frequency an object has that depends on its elasticity and shape is referred to as...

40. ANSWER
Natural Frequency

41. Question 22
When an object receives a sympathetic vibration from an outside source that matches its natural frequency and the object vibrates with a large amplitude _____________ is occurring.

42. ANSWER
Resonance

43. Question 23
If the frequency of a light wave is 6.5 x 108 MHz, and its speed is 300,000,000 m/s. What is its wavelength?

44. ANSWER
4.61x 10-7 meters

45. Question 24
When two waves occupy the same space at the same time they __________ with one another.

46. ANSWER
Interfere

47. Question 25
When two wave interfere that are in phase and the resulting wave that gets created has a larger amplitude __________ interfence has occured.

48. ANSWER
Constructive

49. Question 26
The rhythmic pattern generated by the interference of two waves at a similar frequency is called…

50. ANSWER
Beats

51. Question 27
This is the term for the apparent change in frequency due the motion of the source or observer.

52. ANSWER
Doppler Effect

53. Question 28
One vacuum cleaner makes a sound of 93 decibels. How many decibels do four vacuum cleaners make?

54. Question 31
A rocket engine emits 2.0 x105 Joules of sound energy per second. The sound is emitted in all directions. What is the sound intensity level, measured relative to the threshold of hearing, at a distance of 85 m away?