2. 17.1 Mechanical Waves

3. What is a mechanical wave? A mechanical wave is a disturbance in matter that carries energy from place to place A mechanical wave is a disturbance in matter that carries energy from place to place

4. What do mechanical waves require? Mechanical waves require a medium.

5. What is a medium? A medium is the material through which a wave travels. A medium is the material through which a wave travels.

6. How are mechanical waves created? Mechanical waves are created when a source of energy causes a vibration to travel through a medium.

7. What is a transverse wave? A transverse wave causes the medium to vibrate @ right angles to the direction the wave travels. A transverse wave causes the medium to vibrate @ right angles to the direction the wave travels.

8. Draw a picture of a transverse wave: label crest, trough, rest

9. Name an example of a transverse wave. Shaking a rope & shaking a blanket are examples of transverse waves. Shaking a rope & shaking a blanket are examples of transverse waves.

10. What is a longitudinal wave? A longitudinal wave is a wave in which the vibration of the medium is parallel to the direction the wave travels. A longitudinal wave is a wave in which the vibration of the medium is parallel to the direction the wave travels.

11. Draw a longitudinal wave: label compression and rarefaction

12. Name an example of a longitudinal wave. Slinky springs & P waves (aka primary waves) produced by earthquakes are examples of longitudinal waves. Slinky springs & P waves (aka primary waves) produced by earthquakes are examples of longitudinal waves.

13. What is a surface wave? A surface wave is a wave that travels along a surface separating 2 media – like air and water A surface wave is a wave that travels along a surface separating 2 media – like air and water

14. What is the most familiar kind of surface wave? Ocean waves are the most familiar surface waves. Ocean waves are the most familiar surface waves.

15. A surface wave causes a bobber floating on the water to move an up-and-down motion, as well as a back-and-forth motion. The combined effect of both types of wave motion causes the bobber to move in a circle

17. Bobber buoy… http://footage.shutterstock.com/video.html ?id=286108