4. MECHANICAL WAVES

5. WAVE PROPERTIES

6. SOUND…“WHAT?”

7. SOUNDS OF MUSIC

8. MIXED BAG

9. COOL VIBRATIONS

10. MECHANICAL WAVES WAVE PROPERTIES SOUND… ”WHAT?” SOUNDS OF MUSIC MIXED BAG COOL VIBRATIONS

11. MECHANICAL WAVES REQUIRE THIS IN ORDER TO PROPOGATE

12. THE TYPE OF WAVE THAT STARTS WITH A SINGLE DISTURBANCE. THE TYPE OF WAVE THAT STARTS WITH A SINGLE DISTURBANCE.

13. A WAVE IN WHICH THE PARTICLES OCILLATE PARALLEL TO THE DIRECTION OF PROPOGATION. A WAVE IN WHICH THE PARTICLES OCILLATE PARALLEL TO THE DIRECTION OF PROPOGATION.

14. THE DIRECTION THE RED DOT ON THE WAVE IS MOVING THE DIRECTION THE RED DOT ON THE WAVE IS MOVING

15. DOUBLING THE AMPLITUDE OF A WAVE WILL HAVE THIS EFFECT ON ITS ENERGY DOUBLING THE AMPLITUDE OF A WAVE WILL HAVE THIS EFFECT ON ITS ENERGY

16. THE TIME IT TAKES FOR A WAVE TO COMPLETE ONE CYCLE THE TIME IT TAKES FOR A WAVE TO COMPLETE ONE CYCLE

17. THE FREQUENCY OF A WAVE WHOSE PERIOD IS 2 s. THE FREQUENCY OF A WAVE WHOSE PERIOD IS 2 s.

18. A COLLISION BETWEEN TWO WAVES THAT RESULTS IN A WAVE GREATER THAN ITS COMPONENTS

19. THE EFFECT THAT DOUBLING THE WAVELENGTH HAS ON THE WAVE SPEED

20. THE FREQUENCY OF THE WATER WAVE THE FREQUENCY OF THE WATER WAVE

21. THE PERCEPTION OF HOW HIGH OR LOW A SOUND APPEARS TO BE

22. A REFLECTED SOUND WAVE

23. SOUNDS BELOW 20 HZ SOUNDS BELOW 20 HZ

24. THE SPEED OF SOUND IN AIR AT 25 o C THE SPEED OF SOUND IN AIR AT 25 o C

25. THE MINIMUM DISTANCE A REFLECTIVE SURFACE MUST BE IN ORDER FOR YOU TO HEAR AN ECHO ON A DAY WHEN IT IS 20 o C. THE MINIMUM DISTANCE A REFLECTIVE SURFACE MUST BE IN ORDER FOR YOU TO HEAR AN ECHO ON A DAY WHEN IT IS 20 o C.

26. THE TERM THAT DESCRIBES THE QUALITY OF THE SOUND PRODUCED BY AN INSTRUMENT THE TERM THAT DESCRIBES THE QUALITY OF THE SOUND PRODUCED BY AN INSTRUMENT

27. THE TYPE OF WAVES PRODUCED IN WIND INSTRUMENTS THE TYPE OF WAVES PRODUCED IN WIND INSTRUMENTS

28. THE WAVELENGTH OF THE FIRST HARMONIC ON A 30 cm VIOLIN STRING THE WAVELENGTH OF THE FIRST HARMONIC ON A 30 cm VIOLIN STRING

29. THE FREQUENCY EMITTED BY A PIANO WHEN A TUNER USES A 440 Hz TUNING FORK AND HEARS 2 BEATS PER SECOND THE FREQUENCY EMITTED BY A PIANO WHEN A TUNER USES A 440 Hz TUNING FORK AND HEARS 2 BEATS PER SECOND

30. THE FREQUENCY OF THE 5 TH HARMONIC IN A 1 m ORGAN PIPE THAT IS OPEN AT BOTH ENDS WHEN THE AIR WITHIN THE PIPE IS 20 o C THE FREQUENCY OF THE 5 TH HARMONIC IN A 1 m ORGAN PIPE THAT IS OPEN AT BOTH ENDS WHEN THE AIR WITHIN THE PIPE IS 20 o C

31. THE OBSERVED CHANGE IN FREQIUENCY DUE TO THE MOTION OF A SOUND SOURCE OR OBSERVER THE OBSERVED CHANGE IN FREQIUENCY DUE TO THE MOTION OF A SOUND SOURCE OR OBSERVER

32. WHEN THE FREQUENCY OF A FORCE APPLIED TO A SYSTEM MATCHES THE NATURAL FREQUENCY OF VIBRATION OF A SYSTEM WHEN THE FREQUENCY OF A FORCE APPLIED TO A SYSTEM MATCHES THE NATURAL FREQUENCY OF VIBRATION OF A SYSTEM

33. THE WAVELENGTH OF THE SECOND HARMONIC ON A GUITAR STRING OF LENGTH L. THE WAVELENGTH OF THE SECOND HARMONIC ON A GUITAR STRING OF LENGTH L.

34. THE MAXIMUM POSSIBLE AMPLITUDE OF A RESULTANT WAVE IF WAVES OF 1.0m AND 0.5m AMPLITUDES INTERACT THE MAXIMUM POSSIBLE AMPLITUDE OF A RESULTANT WAVE IF WAVES OF 1.0m AND 0.5m AMPLITUDES INTERACT

35. THE FREQUENCY BEING EMITTED BY THE CAR TRAVELING AT 32 m/s WHEN OBSERVER ‘A’ HEARS A 450 Hz PITCH THE FREQUENCY BEING EMITTED BY THE CAR TRAVELING AT 32 m/s WHEN OBSERVER ‘A’ HEARS A 450 Hz PITCHB A

36. THE FREQUENCY AT WHICH ALL OBJECTS VIBRATE WHEN DISTURBED THE FREQUENCY AT WHICH ALL OBJECTS VIBRATE WHEN DISTURBED

37. A VIBRATION THAT CAUSES ANOTHER OBJECT TO VIBRATE A VIBRATION THAT CAUSES ANOTHER OBJECT TO VIBRATE

38. THE PHENOMENON EXHIBITED IN THE FOLLOWING VIDEO THE PHENOMENON EXHIBITED IN THE FOLLOWING VIDEO

39. THE WAVELENGTH OF AN 88 MHz LIGHT WAVE IF THE SPEED OF LIGHT IS 3.0x10 8 m/s THE WAVELENGTH OF AN 88 MHz LIGHT WAVE IF THE SPEED OF LIGHT IS 3.0x10 8 m/s

40. THE LENGTH OF A GUITAR STRING WHICH VIBRATES AT A FUNDAMENTAL FREQUENCY OF 845 Hz IF THE VELOCITY OF WAVES ON THE STRING IS 574 m/s THE LENGTH OF A GUITAR STRING WHICH VIBRATES AT A FUNDAMENTAL FREQUENCY OF 845 Hz IF THE VELOCITY OF WAVES ON THE STRING IS 574 m/s

43. DOPPLER EFFECT

44. THE SPEED OF A SOUND SOURCE THAT EMITS A SOURCE THAT EMITS A 200 Hz PITCH IF AN OBSERVER HEARS A 180 Hz PITCH ON A 25 o C DAY

45. ANS: 38.4 m/s