1. True
  2. Time Period
  3. A wavelength is the distance between repeating patterns on a wave.
  4. See Sketch
  5. See Sketch
  6. Hertz (Hz)
  7. a: Transverse b: Transverse                     c: Longitudinal   d: Transverse
  8. Two waves collide in interference; they have points where they increase in size (constructive) and points where they decrease in size (destructive).
  9. Standing waves appear to stay in one place (only moving back and forth). Regular waves, like ocean waves, appear to move from one place to another.
  10. On a standing wave, a node is a point of no movement, and an antinode is a point of maximum movement.
  11. Guitar string, organ pipe, air inside a bottle when you blow across it, piano string, etc
  12. The size decreases, making the amplitude smaller.
  13. 6 meters, because the amplitude is only from the midpoint to the top, not the top to bottom.
  14. a: Time would increase because gravity decreases. b: Time would decrease because gravity would increase.              c: Time would decrease because gravity appears to increase.                      d: Time would increase because gravity decreases.
  15. If the frequency of a wave triples, then the period would be three times smaller or 1/3 its starting value.
  16. If the frequency of a wave increases, its wavelength decreases.
  17. One wavelength passes by during one time period, be a period is, by definition, the time it takes to complete ONE cycle of anything.
  18. False
  19. False (just like for ANY wave)
  20. The time period is 60 seconds; the frequency is 1/60 Hz or 0.0167 Hz.
  21. The combined amplitude is 18 feet tall.
  22. The combined wave is zero feet tall.
  23. The frequency is 1/8 Hz or 0.125 Hz.
  24. The wave speed is 10.8 m/s.
  25. The period is 5 seconds, because it’s the time to complete one cycle. The frequency is 1/5 Hz or 0.2 Hz.
  26. Since the period is 15 seconds, the frequency is 1/15 Hz or 0.067 Hz
  27. The wave speed is 12 m/s.
  28. The wave speed is 3.14 m/s.
  29. The wavelength is 2 meters.
  30. The wave speed is 2.25 m/s.