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# waves

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• ### waves

1. 1. Waves Diana Liu and Dan Froehlich
2. 2. Transverse Waves <ul><li>displacement perpendicular to wave motion </li></ul>
3. 3. Longitudinal Waves <ul><li>displacement parallel to wave motion </li></ul>
4. 4. Parts of a wave trough crest
5. 6. Speed of a Wave <ul><li>Velocity -speed at which the wave is traveling </li></ul><ul><li>Frequency -number of times a wave passes a point per second </li></ul><ul><li>Wavelength -Length of wave from crest to crest or trough to trough </li></ul>Velocity = Frequency x Wavelength
6. 7. Constructive Interference <ul><li>When crests and troughs combine, amplitude increases=bigger waves </li></ul>
7. 8. Destructive Interference When crests and troughs meet, they cancel each other out=smaller waves
8. 9. Water Circulation
9. 11. Tsunamis are caused by: <ul><li>Earthquakes </li></ul><ul><li>Landslides </li></ul><ul><li>volcanoes </li></ul>
10. 15. Ocean Waves
11. 16. REVIEW
12. 17. <ul><li>Fill in the blank. </li></ul><ul><li>When the particles of the medium are displaced parallel to the direction of the propagation of the wave, it is called the ___________. </li></ul><ul><li> Water wave </li></ul><ul><li>Torsal wave </li></ul><ul><li>Transverse wave </li></ul><ul><li>Longitudinal wave </li></ul><ul><li>Ultrasonic wave </li></ul>
13. 18. <ul><li>Which of the following is the definition of amplitude </li></ul><ul><li>The maximum displacement from the equilibrium position. </li></ul><ul><li> The total distance traveled by the wave in one full cycle. </li></ul><ul><li>The energy reflected by a fixed medium. The lowest frequency that produces a standing wave. </li></ul><ul><li>A rotating wheel. </li></ul>
14. 19. <ul><li>What is a transverse wave? </li></ul><ul><li>The rate with which the amplitude of the wave pulsates. </li></ul><ul><li>The disturbance of the particles is in the same direction as the propagation of the wave. </li></ul><ul><li> A wave of alternating lower and higher pressure. </li></ul><ul><li>A fraction of the original sound intensity absorbed by the material at some given frequency. The particles of the medium that are displaced perpendicular to the direction of propagation. </li></ul>http://library.thinkquest.org/C005705/English/Waves/quiz.htm
15. 20. http://www.antonine-education.co.uk/Physics_A2/Module_4/Topic_4/Quiz_A2_4_4.htm <ul><li>In a wave, the distance between the crest and a trough is: </li></ul><ul><li>  The equilibrium position </li></ul><ul><li>  The amplitude </li></ul><ul><li>  The double amplitude </li></ul><ul><li>  The wavelength </li></ul>
16. 21. <ul><li>The frequency of a wave is: </li></ul><ul><li>  The power per unit area of a wave. </li></ul><ul><li>  The distance between two successive crests </li></ul><ul><li>  How long a wave takes to pass a point. </li></ul><ul><li>  The number of waves per second </li></ul>