WAVES & SOUNDPROBLEM SET NAME:

  1. Wave Terminology
  1. The ______of a wave is determined by the rate at which the source produces the wave.
  2. Waves that require a medium are ______waves.
  3. The ______of a wave is determined by the amount of energy that the wave carries.
  4. The particles vibrate parallel to the direction of energy transmission in ______waves.
  5. The time required for one complete cycle is called the ______.
  6. The particles vibrate perpendicular to the direction of energy transmission in ______waves.
  7. The ______of a wave is determined by the material through which it travels.
  8. Sound waves are an example of ______and ______waves.
  9. Use the diagram below to identify amplitude and wavelength.
  1. The ______is a group of transverse waves that can travel through a vacuum.

  1. frequency
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  1. mechanical
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  1. amplitude
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  1. longitudinal
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  1. period

  1. transverse
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  1. speed
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  1. longitudinal; mechanical
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  1. amplitude (D) wavelength (A)
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  1. Electro-
magnetic Spectrum
  1. Wave Types

____ 1.waves that require a medium
____ 2.particles vibrate perpendicular to direction of energy transfer
____ 3.
____ 4.waves that do not require a medium
____ 5.particles vibrate parallel to the direction of energy transfer
____ 6.sound waves
____ 7.light waves
____ 8.water waves
____ 9. / A)longitudinal waves
B)mechanical waves
C)electromagnetic waves
D)transverse waves
  1. A/B
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  1. D
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  1. D
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  1. C
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  1. A

  1. A/B
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  1. D/C
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  1. D/B
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  1. A

  1. Wave Parts
______10.
______11.
______12.
______13.
______14.
______15. /


  1. Compression
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  1. Crest
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  1. Amplitude

  1. Rarefaction
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  1. Wavelength
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  1. Trough

  1. Wave Velocity

1.(I) A fisherman notices that wave crests pass the bow of his boat every 3.0 s. He measures the distance between two consecutive crests to be 7.5 meters. How fast are the waves traveling?

2.(I)A particular sound wave in air has a frequency of 262 hertz and travels at 330 m/s. How far apart are the compressions of this sound wave?

3.(I) Calculate the wavelength of a radio wave that has a frequency of 108 MHz.

4.(I) Determine the wavelength of a 5,000 Hz sound wave traveling along an iron rod. (Speed of sound in iron is 3581 m/s.)

5.(II) A sonar signal (sound wave) is sent from a ship at the water’s surface to ocean floor below. The reflected signal is detected 3.00 s later. How deep is the ocean beneath the ship? (Speed of sound in sea water is 1396 m/s.)

6.(II) On a day when the temperature is 20oC the speed of sound is 343 m/s, a hiker determines the length of a lake by listening for her echo of a shout that is reflected off a rock cliff at the far end of the lake. She hears her echo 2.5 s after shouting. Estimate the length of the lake.

7.(II) A fishing boat is floating directly above a school of tuna on a foggy day. About 1.5 km away, an engine on another boat backfires. If air temperature is 25oC and the speed of sound is 346 m/s, what is the time difference between the tuna hearing the backfire and the fisherman on the boat above the tuna hearing the backfire? (Speed of sound in sea water 1396 m/s.)

8.(II) Your buddy Ken is standing 540 m away from you along a concrete sidewalk. Ken drops a stone on the sidewalk. A moment later you hear two sounds: one travels through air the other through concrete, what is the time difference between the two sounds? (Speed of sound in air is 343 m/s and in concrete is 2949 m/s.)

9.(II) A police car’s siren produces a frequency of 1600 Hz when at rest. (Speed of sound wave produced by siren is 343 m/s.) What is the frequency detected if

a.the car is moving toward an observer at 25 m/s?

b.the car is moving away from an observer at 25 m/s?

  1. 2.5 m/s
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  1. 1.26 m
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  1. 2.78 m

  1. 0.7162 m
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  1. 2094m

  1. 428.8 m
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  1. 3.261 s

  1. 1.391 s
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  1. a) 1.7 x 103 hz b) 1.5 x 103 hz

  1. Wave Interactions

1.Label the diagram shown below with the appropriate letters.

a) Normal

b)Angle of incidence

c)Angle of reflection

d)Incident ray

e)reflected ray

  1. (I) Light traveling through air is incident upon a piece of crown glass at an angle of 45o.What is the angle of refraction to the nearest degree?
  1. (I) A ray of light passes from air into water at angle of 30o. What is the angle of refraction?
  1. (II) A light wave travels through air into an unknown liquid. If the angle of incidence is 30o and the angle of refraction is 22o,

a.what is the index of refraction for the liquid?

b.what is the liquid?

  1. (II) Use figure 1 at theend of this section to find θ1 and θ2.
  1. (III) Use figure 2 at the end of this section to answer this question. A 2 m vertical pole extends from the bottom of a swimming pool to a point 50 cm above the water surface. Sunlight hits the water at an angle of 55o measured from the surface of the water. What is the length of the shadow of the pole on the bottom of the pool?
  1. (I) Calculate the speed of light in the following:
  2. Quartz
  3. Polyethylene
  4. Diamond
  1. (I) What is the critical angle for a sample of flint glass surrounded by air?

FIGURE 1FIGURE 2

incident wave reflected wave

38o θ1

n = 1.58

n = 1.22

θ2

refracted wave

  1. See instructor
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  1. 28o
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  1. 22o
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  1. a) 1.33 b) water

  1. θ1: 38o θ2: 52.9O
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  1. 1.07 m
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  1. a) 2.05x108 m/s b) 1.97x108m/s c) 1.23x108m/s
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  1. 38.4o