Waves & Sound

1. Waves & Sound 10 20 30 40 50 Waves & Motion 10 20 30 40 50 Sound 10 20 30 40 50 Frequency 10 20 30 40 50 Sound & Speed 10 20 30 40 50

2. Category 1 questions follow

3. Category 1 10 When energy is transferred by a wave from a vibrating source to a distant receiver, there is no transfer of ____________ between the two points

4. Category 1 10 When energy is transferred by a wave from a vibrating source to a distant receiver, there is no transfer of matter between the two points

5. Category 1 20 For transverse waves the wave’s amplitude is _____________ to the wave’s motion.

6. Category 1 20 Transverse Waves- For transverse waves the wave’s amplitude is perpendicular to the wave’s motion.

7. Category 1 30 The source of all waves is something that ______.

8. Category 1 30 The source of all waves is something that vibrates. The frequency of the vibrating source and the frequency of the wave it produces are the same.

9. Category 1 40 Theback and forth vibration in a direction parallel to the wave's motion forms a ________ wave where both the amplitude and wave motion are parallel.

10. Category 1 40 Longitudinal Waves- back and forth vibration in a direction parallel to the wave's motion; amplitude and wave motion are parallel.

11. Category 1 50 ___________was the first person to break the sound barrier when he flew faster than the speed of sound in the X-1 rocket-powered aircraft on October 14, 1947.

12. Category 1 50 Chuck Yeagerwas the first person to break the sound barrier when he flew faster than the speed of sound in the X-1 rocket-powered aircraft on October 14, 1947.

13. Category 2 questions follow

14. Category 2 10 What is the approximate distance of a thunderstorm when you note a 10 second delay between the flash of the lightning and the sound of the thunder?

15. Category 2 10 What is the approximate distance of a thunderstorm when you note a 10 second delay between the flash of the lightning and the sound of the thunder? Answer 10 seconds  340 meters/second= 3400 meters

16. Distant galaxies show a ______ shift in the light they emit, indicating that the universe is expanding (or moving further apart) 20

17. Category 2 20 Red Shift - a decrease in frequency towards the low-frequency, or red, end of the light spectrum (light source is moving away from the receiver) Distant galaxies show a red shift in the light they emit, indicating that the universe is expanding (or moving further apart)

18. Category 2 30 The bending of a wave is called ___________

19. Category 2 30 Refraction

20. Category 2 40 When the speed of the source in a medium is as great, or greater, than the speed of the wave it produces it will catch up to the wave crests and pass them producing a V-shape. The V shape wave is called a _____________

21. Category 2 40 Bow Wave – when the speed of the source in a medium is as great, or greater, than the speed of the wave it produces it will catch up to the wave crests and pass them producing a V-shape.

22. Category 2 50 Natural Frequency is the frequency at which an elastic object naturally tends to vibrate. At this frequency, a minimum energy is required to produce a forced vibration. The result of forced vibrations in a body when the applied frequency matches the natural frequency of the body is called ___________.

23. Category 2 50 Resonance

24. Category 3 questions follow

25. Category 3 10 Sound travels faster in ______air than ____ air

26. Category 3 10 Sound travels faster in warm air than in cool air.

27. Category 3 20 __________ is are-echoed sound, where multiple reflections of sound waves bounce off walls

28. Category 3 20 Reverberation - re-echoed sound, multiple reflections of sound waves from walls

29. Category 3 30 In the Doppler Effect, the change in tone occurs when The object is moving toward you The object is moving away from you You are moving toward the sound You are moving away from the sound A and b are correct The emitter and receiver are moving in relation to each other

30. Category 3 30 F The emitter and receiver are moving in relation to each other

31. Category 3 40 When the crest of one wave overlaps the crest of another, they are “in phase” and when their individual effects are add together they produce a wave of ____________ amplitude.

32. Category 3 40 When the crest of one wave overlaps the crest of another, they are “in phase” and when their individual effects are add together they produce a wave of increased amplitude.

33. Category 3 50 ___________ is the maximum displacement from equilibrium.

34. Category 3 50 Amplitude-the distance from the midpoint to the crest (or trough) of the wave. The amplitude equals the maximum displacement from equilibrium.

35. Category 4 questions follow

36. Category 4 10 Sounds that are too high for us to hear are called___

37. Category 4 10 infrasonic frequencies < 20 Hz ultrasonicfrequencies > 20,000 Hz

38. Category 4 20 The human hearing range is ___ - _____ Hz

39. Category 4 20 frequencies between 20 Hz and 20,000 Hz human hearing range

40. Category 4 30 The to-and-fro vibratory motion (often called oscillatory motion) of a swinging pendulum in a small arc is called ______________motion

41. Category 4 30 The to-and-fro vibratory motion (often called oscillatory motion) of a swinging pendulum in a small arc is called simple harmonic motion

42. Category 4 40 Period- Time required for a full oscillation (one round trip) is called the _________of oscillation.

43. Category 4 40 Period- Time required for a full oscillation (one round trip) is called the period of oscillation.

44. Category 4 50 Sound cannot travel in a ____________.

45. Category 4 50 Sound cannot travel in a vacuum. If there is no medium to vibrate, then no sound is possible.

46. Category 5 questions follow

47. Category 5 10 What is the speed of Sound in Air at sea level?

48. Category 5 10 340 meters/second or 760 miles/hour; Mach 1

49. Category 5 20 When a sound wave strikes a surface it can be.… Reflected- bounces off Transmitted- sent through Absorbed- taken in All of these.

50. Category 5 20 All of these.