the seismic waves produced ______ The seismic waves produced by earthquakes are
ID: 1628388 • Letter: T
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the seismic waves produced ______ The seismic waves produced by earthquakes are made up of several kinds of waves, including sound waves. What happens to the energy contained in the sound waves? (Choose as many as apply.) (A) It makes rocks vibrate in the same direction as the waves. (B) It makes rocks vibrate at right angles to the waves. (C) Because solids generally have higher densities than gases, the energy is transmitted more quickly through the earth than it would be if the sound waves traveled through air. (D) Because solids are generally more elastic than gases, the energy is transmitted more quickly through the earth than it would be if the sound waves traveled through air. _________ As a train approaches a grade crossing, it sounds its whistle, whose frequency is 350 Hz. What is the frequency of the sound heard by someone waiting at the grade crossing? (A) 350 Hz (B) greater than 350 Hz (C) less than 350 Hz (D) The person at the grade crossing would not be able to hear the whistle, no matter what its frequency. _____ The pattern produced in the illustration on page 89 of this study guide most likely results from (A) the Doppler effect (B) ultraviolet radiation (C) penumbras (D) constructive and destructive interference of light waves (E) polarization of light waves. __________ Shock waves are produced by which of the following? (Choose as many as apply.) (A) when the crests of sound waves overlap, causing constructive interference (B) when the crests of some sound waves overlap the troughs of others, resulting in destructive interference (C) by supersonic aircraft (D) by subsonic aircraft (E) only at the moment an aircraft breaks the "sound barrier" ________ Which of the following is true of a solar eclipse? (Choose as many as apply.) (A) It is caused by the sun's shadow on the earth. (B) It is caused by the moon's shadow on the earth. (C) It is caused by the earth's shadow on the sun. (D) It occurs more often than a lunar eclipse. (E) Each solar eclipse can only be observed in a small region of the earth at any given time, whereas lunar eclipses can be observed by anyone on the nighttime half of the earth. _________ In what ways are sound and light waves similar? (Choose as many as apply) (A) They both are forms of energy. (B) Neither experiences the Doppler effect. (C) They both can experience interference. (D) They both move in space. (E) They both are transverse and therefore both can be polarized. ________ In what ways are sound and light waves different? (Choose as many as apply.) (A) The speed of light waves is greater than the speed of sound waves. (B) Sound waves can travel in a vacuum, but light waves cannot. (C) Sound waves are longitudinal, while light waves are transverse. (D) Light waves are produced by accelerating electric charges, while sound waves are produced by the mechanical vibration of matter. (E) Sound waves experience the Doppler effect, while light waves do not.Explanation / Answer
Q.13 (A) It makes rocks vibrate in the same direction as the waves (B)It makes rocks vibrate at right angles to the waves (C).Because solids generally have higher densities than gases, the energy is transmitted more quickly through the earth than it would be if the sound waves traveled through air.
Q.14 Due to Doppler effect, when sound source approaches the observer, frequency of sound increases. Thus, (B) Greater than 350Hz
Q.15 Pattern is not provided in the question
Q.16 (C) by supersonic aircraft
Q.17 (A) It is caused by the sun's shadow on the earth (E) Each solar eclipse can only be obeserved in small region of the earth at any given time, whereas lunar eclipses can be observed by anyone on the night time half of the earth
Q.18 (A) They both are forms of energy (C) They both can experience interference (E) They both are transverse and therefore both can be polarized. (Reason: Sound waves are both longitudinal and transverse in the solids. Thus, sound waves can be polarized only in solids)
Q.19 (A) The speed of light waves is greater than the speed of sound waves (D) Light waves are produced by accelerating electric charges, while sound waves are produced by the mechanical vibration of matter. (Reason: Light is a form of Electromagnetic radiation)
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