Mechanical Waves Review Paper

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Waves Review Modified True/False Indicate whether the statement is true or false. If false, change the identified word or phrase to make the statement true. ____ 1. Sound waves do not carry energy. _________________________ ____ 2. Mechanical waves need a medium through which to transport energy. _________________________ ____ 3. The particles in a surface water wave move back-and-forth only. _________________________ ____ 4. Waves in which the particles of medium move at right angles to the direction of the wave are compressional waves. _________________________ ____ 5. Waves caused by an earthquake are called uniform waves. _________________________ ____ 6. The troughs of a transverse wave correspond to the compressions…show more content…
Wave A has a greater frequency than wave B, but the amplitude of the two waves is the same. The energy of wave A is greater than that of wave B. _________________________ ____ 12. The unit for frequency is the meter. _________________________ ____ 13. The property of light that allows you to see yourself in a mirror is reflection. _________________________ ____ 14. Sound requires a medium. ____________________ ____ 15. Sound will travel through water at 20°C faster than water at 80°C. ____________________ ____ 16. The amount of energy a wave carries determines its amplitude. ____________________ ____ 17. When a listener moves toward the source of a sound wave, the compressions of the wave are spread out. ____________________ ____ 18. The frequency at which a string vibrates is its standing wave. ____________________ ____ 19. Electromagnetic waves carry mechanical energy. _________________________ ____ 20. As the frequency of an electromagnetic wave increases, the speed of the wave increases. _________________________ ____ 21. The amount of energy a photon carries is determined by its mass.…show more content…
79. ANS: Yes, speed and direction will change. 80. ANS: Both cause waves to bend. Refraction occurs when waves change speed when changing media. Diffraction occurs when waves bend around a barrier. 81. ANS: At the node, destructive interference takes place. At the crest (antinode), constructive interference takes place. 82. ANS: Sound is produced by the vibration of an object. The vibrating object collides with nearby molecules transferring energy to them. These molecules collide with other molecules transferring the sound through the medium. 83. ANS: Light can travel without a medium, but sound cannot. There is no medium between Earth and the Sun. 84. ANS: No, the Doppler effect depends only on whether the sound is moving toward the microphone and away from it, not on direction. 85. ANS: The pitch of the siren seems to lower and the loudness decrease. 86. ANS: The wavelength decreases; the amplitude and speed are not affected. 87. ANS: Light undergoes refraction, diffraction, and interference like all waves. Its energy depends on frequency, which is how a particle behaves. 88.

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