Transverse Wave

1
Transverse Wave

• 1.
• Janet looks up "Waves" in her science book. She
  finds a diagram of one type of wave (shown at
  right) called a transverse wave.
• Which statement below best describes a transverse
  wave?
• (a) A transverse wave carries the medium with it
  like an ocean water wave. (b) In a transverse
  wave, particles of the medium move "up down".
• (c) All waves look alike "transverse" is a label
  we use for water waves. (d) Because of their "up
  down" motion, transverse waves only move in
  certain directions.

2
Longitudinal

• 2.
• Another type of wave that Janet finds (shown at
  right) is a longitudinal (or compression) wave.
• Which statement below best describes a
  longitudinal wave?
• (a) Longitudinal waves move particles in the
  medium back forth, but they leave the particles
  in about the same place.
• (b) Unlike transverse waves, longitudinal waves
  carry particles of the medium along with the
  wave. (c) As a longitudinal wave moves through a
  material, particles in the material move "up
  down".
• (d) Unlike transverse waves, the label
  "longitudinal waves" describes objects that
  vibrate.

3
Waves

• 3. Which of these is not related to wave speed?
• A. Amplitude
• B. Frequency
• C. Wavelength
• D. Medium wave travels through

4
Waves

• 4. Which of these will not affect the frequency
  of a wave?
• A. Wavelength C. Speed
• B. Period D. Amplitude

5
Waves

• 5. A tsunami wave has a wavelength of 100 miles
  and a wave speed of 600 mi/hr. How frequently
  will wave crests reach land?
• A. Every 5 min. C. Every 15 min.
• B. Every 10 min. D. Every 20 min.

6
Interference

• 6. If the two waves to the right are added
  together, there will be
• A. Constructive Interference
• B. Destructive Interference
• C. Both Constructive and Destructive
  Interference
• D. No interference

7
Interference

• 7. If the two waves to the right are added
  together, there will be
• A. Constructive Interference
• B. Destructive Interference
• C. Both Constructive and Destructive
  Interference
• D. No interference

8
Interference

• 8. If the two waves to the right are added
  together, there will be
• A. Constructive Interference
• B. Destructive Interference
• C. Both Constructive and Destructive
  Interference
• D. No interference

9
Interference

• 9. Bill and Jane are attending a concert in a
  small studio. Jane is sitting in front of Bill.
  Bill cant hear certain notes very well, while
  Jane can hear the same notes very loudly. What
  is the most likely explanation for this?
• A. Janes body is absorbing the sound waves
  before they reach Bill.
• B. The sound waves reflect off Janes body and
  do not reach Bill.
• C. Standing waves in the studio produce
  anti-nodes where Jane sits, and nodes where Bill
  sits.
• D. Jane has more musical training than Bill, so
  she can hear all notes well, while Bill cant.

10
Resonance

• 10. Susie can bounce a ball for hours, but her 3
  year old sister Sara cant bounce a ball more
  than 2 or 3 times before the ball is dead on the
  ground. What is the most likely reason for
  Saras failure?
• A. Sara isnt strong enough to bounce the ball
  more than a few times.
• B. Sara cant make her hand motions match the
  balls natural frequency of bouncing.
• C. Sara isnt tall enough to bounce the ball at
  a natural frequency.
• D. Three year olds cant do anything.

11
Standing Waves

• 11. What are standing waves?
• A. Stable patterns of constructive and
  destructive interference.
• B. Football-shaped waves.
• C. Objects which vibrate with forced
  frequencies.
• D. Waves which are created when transverse and
  longitudinal waves interact.

12
Standing Waves

• 12. Which of the following is not an example of
  a standing wave?
• A. A vibrating guitar string playing a G note.
• B. The Tacoma Narrows Bridge just before it
  collapsed.
• C. A spring oscillating with clear anti-nodes
  and nodes.
• D. A single pulse on a slinky traveling from one
  person to another.

13
Music

• 13. When a C-note on a piano is struck, three
  other notes start vibrating also. Which concepts
  explain why this happens?
• A. Resonance and destructive interference
• B. Harmonics and the Doppler Effect
• C. Destructive interference and the Doppler
  Effect
• D. Resonance and harmonics

14
Music

• 14. John plays a flute. When he covers one of
  the holes, the flute changes notes. Why does
  this happen?
• A. Johns finger over the hole resonates with
  the flute.
• B. The length of the standing wave within the
  flute changes.
• C. Johns finger is a different medium than the
  flute, and vibrates differently.
• D. John is exerting more tension on the flute,
  which changes the frequency of vibrations.

15
Music

• 15. Which of the following would make a soap box
  guitar play a lower note?
• A. Stretching the rubber band tighter
• B. Shortening the rubber band
• C. Plucking the rubber band harder
• D. Plucking a thicker rubber band

16
Media for wave travel

• 16. Which of the following would be the worst
  media for sound wave transmission?
• A. Copper wire
• B. Water
• C. Air
• D. They will all transmit the sound wave equally
  well.

17
Light vs. Sound

• 17. A boy sees a high-flying airplane before he
  hears it. Which of the following is the most
  likely explanation?
• A. Light waves from the airplane travel to the
  boy faster than sound waves.
• B. The Doppler Effect slows down sound waves but
  not light waves
• C. Sound needs a medium for wave travel but
  light doesnt
• D. The boy probably sees better than he hears.

18
Media

• 18. Jason hates the sound of his voice when he
  hears it on a videotape. Why does it sound so
  different than when he listens to himself talk?
• A. The videotape distorts his voice.
• B. The tape within the video player is a poor
  medium for playing sound waves.
• C. Jasons voice was transmitted to the video
  recorder through air, while he hears his voice
  through solids, liquids and gases.
• D. The sound is the same, Jason just thinks it
  sounds different when he hears it on videotape.

19
Media

• 19. A sound is heard sooner when it travels
  through a railroad track than when it travels
  through the air. Why?
• A. Sound travels faster through steel railroad
  tracks than through air.
• B. The sound waves travel in all directions
  through air, while the railroad track only allows
  it to travel in one direction.
• C. Sound always travels the same speed, but it
  travels farther through steel than through air.
• D. The Doppler Effect makes it seem as though
  the sound travels faster through the steel.

20
Media

• 20. A Klingon ship fires a phaser cannon at a
  Federation spaceship. The Federation ship hears
  the sound and moves their ship out of the way
  just in time. What is wrong with this scenario?
• A. Everyone knows that phaser cannons produce no
  sound.
• B. The phaser beam travels infinitely fast, so
  there is no way to avoid it.
• C. Sounds cannot travel through space.
• D. Klingons do not have phaser cannon technology.

21
Doppler Effect

• 21. During which of these situations will you
  hear a sound that is higher-pitched than the
  actual sound that is being produced?
• A. A car is moving away from you.
• B. You are running toward a stationary car.
• C. The car is not moving but is 300 m away from
  you (youre not moving either)
• D. You inhale helium while listening to the car

22
Waves Math

• 22. If the period of a swing is 5 seconds, the
  frequency of the swing will be
• A. 5 Hz
• B. 0.2 Hz
• C. 5 sec
• D. 0.2 sec

23
Waves Math

• 23. If a wavelength is 5 m and the frequency is
  10 Hz, the wave speed will be
• A. 0.5 m/sec C. 15 m/sec
• B. 2 m/sec D. 50 m/sec

24
Waves Math

• 24. If a wave is traveling at 10 m/sec and at a
  frequency of 5 Hz, the wavelength will be
• A. 0.5 m C. 15 m
• B. 2 m D. 50 m

25
Waves Math

• 25. If a wave traveling along a rope is reflected
  and returned to the wave-maker in 2 seconds, and
  the speed of the rope wave is 6 m/sec, then how
  long is the rope?
• A. 0.33 m C. 6 m
• B. 3 m D. 12 m

26
Answers

1. B 11. A 21. B
2. A 12. D 22. B
3. A 13. D 23. D
4. D 14. B 24. B
5. B 15. D 25. C
6. A 16. C
7. B 17. A
8. C 18. C
9. C 19. A
10. B 20. C