Wave Review. Wave Characteristics: Label each of the following wave characteristics in the space below B A TROUGH PEAK
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1 Name: KEY Section: Date: Wave Review Wave Characteristics: Label each of the following wave characteristics in the space below B A C E D F G A Resting Location D WAVELEGTH G TROUGH B PEAK E AMPLITUDE WAVELENGTH C F AMPLITUDE Making Waves: For each situation, identify the source of energy producing the wave and the medium through which the wave is traveling. 1. Rock falling ROCK WATER
2 2. Drum surface air 3. SUN Vacuum 4. Microwave oven A vacuum 5. Guitar string Air 6. Wind Water
3 Determining Frequency: Determine the frequency of each wave 7. Frequency = 2 Hertz Frequency = Hertz 1 2 time (s) time (s) 9. Frequency = 4 Hertz time (s) Determining Wavelength: Use a ruler to determine the wavelength of each wave. 10. Wavelength = cm 11. Wavelength = cm 12. Wavelength = cm
4 Multiple Choice Review 1. Which of the following is the best example of a wave? A. a stone rolling downhill B. a vehicle traveling on a bumpy road C. a string vibrating on a guitar D. a grasshopper jumping up and down occasionally. 2. The diagram below shows a wave trace. Distance Z is a measure of A. amplitude. B. frequency. C. wavelength. D. wave speed. 3. The illustration below shows three toy ducks floating on water, moving up and down as a wave travels to the right with a velocity of 3 m/s.. Which of the following is the frequency of the wave? A Hz B Hz C. 1.5 Hz D. 6.0 Hz
5 4. The figure below shows a spring with a wave traveling through it. Which type of wave is illustrated? A. sound B. transverse C. longitudinal D. electromagnetic 5. What is the frequency of ocean waves that have a speed of 18 m/s and a wavelength of 50 m? A Hz B Hz C. 2.8 Hz D. 9.0 Hz 6. The diagram below represents a mass suspended vertically by a rubber band. The mass is set in motion by pulling down slightly on the mass and letting go. Which of the following correctly identifies the up-and-down motion of the mass? A. torsional B. transverse C. nonharmonic D. simple harmonic
6 7. Each of the following illustrations shows the movement of a 1 kg object. Which of these is an example of simple harmonic motion? 8. An organ pipe produces a musical note with a wavelength of 2.72 m. What is the frequency of this note if the speed of sound is 348 m/s? A Hz B. 128 Hz C. 260 Hz D. 466 Hz 9. Which of the following best describes the relationship between frequency and wavelength of electromagnetic waves? A. If the frequency remains constant, the wavelength increases. B. The wavelength decreases as the frequency decreases. C. The frequency increases as the wavelength decreases. D. If the wavelength remains constant, the frequency increases. 10. Five bowling balls are lined up touching one another on a smooth surface. Striking the first ball with a hammer makes the fifth ball move away from the group. The force of the hammer was transmitted through the line of balls as what type of wave? A. electromagnetic B. heat C. longitudinal D. transverse
7 11. What causes sound? A. sunlight B. vibrations C. x-rays D. pitch 12. Sound reaches our ears because sound makes air particles A. heat up. B. cool down. C. slow down. D. vibrate. Wave Speed Equation Practice 1. A wave has a frequency of 50 Hz and a wavelength of 10m. What is the speed of the wave? f = 50 Hz λ = 10 m v? v = λ / f v = (10 m)/(50 Hz) v = 0.2 m/s 2. The speed of a wave is 5m/s. Its wavelength is 2m. What is the frequency of the wave? f? f = v / λ λ = 2 m v = 5 m/s f = (5 m/s)/(2 m) v = 2.5 m/s
8 OPEN RESPONSE: BE SURE TO ANSWER AND LABEL ALL PARTS OF THE QUESTION. Show all your work (diagrams, tables, or computations) in your Student Answer Booklet. If you do the work in your head, explain in writing how you did the work. The map below represents the area near the origin of an earthquake. Earthquakes generate several different kinds of waves. Longitudinal waves are called P waves, and transverse waves are called S waves. The P waves have a greater velocity than the S waves. An earthquake occurs and these waves travel to point A. a. Which type of wave is first to reach point A? b. Describe the expected movement of the ground due to the P waves and explain your reasoning. c. Describe the expected movement of the ground when the S waves reach point A, and explain your reasoning. a. Claim: P waves reach point A first. Evidence: We are told that P waves travel faster. Reasoning: When a wave travels faster, it travels the same distance in less time. b. Claim: The ground will move back and forth when a P waves passes through. Evidence: We are told that P waves are longitudinal waves. Reasoning: Longitudinal waves are defined as waves in which the medium moves parallel (in the same direction) as the wave is traveling. If the wave travels from the origin to point A, the ground will move back and forth between those two locations. c. Claim: The ground will not move when an S wave reaches point A. Evidence: We are told S waves are transverse waves and we can also see in the picture that there is a lake between point A and the origin of the earthquake. Reasoning: Transverse waves can only travel through a solid medium (like the ground); they cannot travel through a liquid (like the lake).
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