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Mr.. Z’s “Waves” Unit #2

Mr.. Z’s “Waves” Unit #2. Mr.. Z about to catch some “Air”. Mr.. Z’s “Riding One Home!”. Mrs. Z. AIM : What are two types of Mechanical waves?. Objectives. Identify the two kinds of waves Identify crests and troughs, compression and rarefaction.

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Mr.. Z’s “Waves” Unit #2

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  1. Mr.. Z’s “Waves” Unit #2

  2. Mr.. Z about to catch some “Air”

  3. Mr.. Z’s “Riding One Home!”

  4. Mrs. Z

  5. AIM:What are two types of Mechanical waves? Objectives Identify the two kinds of waves Identify crests and troughs, compression and rarefaction

  6. AIM:What are two types of Mechanical Waves? Vocabulary Longitudinal, transverse, crest, trough, compression, rarefaction

  7. Quick Review! What is a wave? The transfer of energy caused by a disturbance or a vibration

  8. What is a Mechanical Wave? Definition: a Wave which requires a medium Do Electromagnetic Wave require a medium. NO

  9. There are three types of mechanical waves • Transverse * • Longitudinal * • Combinations or surface waves * We are going to study these two types today

  10. DRAW THIS IN YOUR NOTEBOOK This is picture of a transverse wave

  11. TRANSVERSE WAVES • EXAMPLE: “waves made with the rope” • EXAMPLE: “water waves” • DEMONSTRATE:When the wave moved in one direction, which way did the particles of the medium move? (Duck, Ribbon)

  12. TRANSVERSE WAVES • DEFINITION: • The particles of the medium typically move perpendicular to the movement of the wave!

  13. DRAW THIS IN YOUR NOTEBOOK

  14. The highest point the waves reaches is called the crest.

  15. The highest point the wave reaches is called the crest.

  16. The lowest point is called the trough.

  17. The lowest point is called the trough.

  18. AIM:What are two wave Types? Let's Practice !

  19. A B C

  20. A B C What is @ A ?

  21. B C What is @ A ?

  22. B C What is @ C ?

  23. B What is @ C ?

  24. AIM:What are two wave Types? B What is @ B ?

  25. AIM:What are two wave Types? What is @ B ?

  26. Where is the Crest ?

  27. Where is the Crest ?

  28. Where is the trough ?

  29. Where is the trough ?

  30. What is the other type of Mechanical Wave? • LONGITUTDINAL WAVES • “slinky waves” like the waves of a slinky (demonstrate) *** SHOW Transparency 58: Longitudinal Wave

  31. LONGITUTDINAL WAVES • Definition: the particles of the medium move parallel – or in the same direction – as the “movement of the wave”

  32. DEMONSTRATE WITH A SLINKY The area where the coils are compacted is called the COMPRESSION The area where the coils are spread out is called the RAREFACTION

  33. After the compression rarefaction pass, the medium (the slinky) returns to normal.

  34. Where are the compressions?

  35. Where are the compressions?

  36. Where are the rarefactions?

  37. Where are the rarefactions?

  38. The crest of a transverse wave is similar to the compression of a longitudinal wave

  39. Which way does the particles of the medium move

  40. Which way does the particles of the medium move

  41. Tuning Fork Demonstration (click here)

  42. AIM:What are two wave Types? Guitar Demonstration (click here)

  43. Two Types of Mechanical Waves Transverse Longitudinal Crests and Troughs Compressions & rarefactions

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