1. 10 pt 15 pt 20 pt 25 pt 5 pt 10 pt 15 pt 20 pt 25 pt 5 pt 10 pt 15 pt 20 pt 25 pt 5 pt 10 pt 15 pt 20 pt 25 pt 5 pt 10 pt 15 pt 20 pt 25 pt 5 pt Wave Interactions Wave Properties Wave Properties The E. S.Sound

2. the angle of incidence

3. Angle B

4. A wave bends as it crosses a boundary

5. refraction

6. Which ray best describes the path of the light reflected from the mirror?

7. Ray c

8. What is the amplitude of this wave?

9. 2 meters

10. When multiple waves combine to make a wave of smaller amplitude?

11. Destructive interference

12. Which graphs has an amplitude of 10 centimeters?

13. Graph C

14. Which of the graphs has a period of two seconds?

15. Graph C

16. Which diagram illustrating two waves “in phase”? AB C

17. Diagram A

18. The distance from crest to crest

19. The wavelength of a wave

20. Waves that travel perpendicular to the direction of oscillations?

21. A transverse wave

22. Number of cycles that occur in one second

23. frequency

24. How many anti-nodes does this standing wave have?

25. Three anti-nodes (Four nodes)

26. Reflected sound is called?

27. echo

28. What is the wavelength of this waves?

29. λ = 1 meter

30. The unit for frequency

31. Hertz

32. What is the area pointed to in #2:

33. rarefaction

34. What types of waves is this:

35. Compressional or longitudinal

36. The energy of a wave is in its:

37. Amplitude

38. = a system that shows harmonic motion.

39. Oscillator (oscillating system)

40. How many complete cycles are there on this graph?

41. (4) four

42. When motion is faster than the speed of sound?

43. supersonic

44. Polly is standing on the bottom of a wide canyon, leaning against its wall. She shouts "hello" toward the opposite side of the canyon. If the speed of sound is 340 m/sec and Polly hears her own echo 4 seconds later, how wide is the canyon?

45. 680 meters 2 seconds (2 seconds x 340 meters/sec)

46. Sound waves are always (type of wave)?

47. compressional (longitudinal) waves

48. What is this wave’s period?

49. 2 seconds

50. The amplitude of a wave of sound is :

51. loudness