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Longitudinal Wave

Longitudinal Wave. Longitudinal Wave. Bending of Sound Waves. Ultra-Sound (high frequency). Ultra-Sound (high frequency). Natural Frequency. Resonance. Resonance. Interference. Noise-canceling Earphones. AM, FM Radio. beats. -- Questions --. MULTIPLE CHOICE.

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Longitudinal Wave

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  1. Longitudinal Wave

  2. Longitudinal Wave

  3. Bending of Sound Waves Ultra-Sound (high frequency)

  4. Ultra-Sound (high frequency)

  5. Natural Frequency Resonance

  6. Resonance

  7. Interference Noise-canceling Earphones

  8. AM, FM Radio

  9. beats

  10. -- Questions -- MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.

  11. 1) Compressions and rarefactions are characteristic of • longitudinal waves. • B) transverse waves. • C) both of these. • D) neither of these. • 2) A sound wave is a • A) standing wave. • B) shock wave. • C) transverse wave. • D) longitudinal wave. • E) none of these.

  12. 3) The speed of a sound wave in air depends on • A) its wavelength. • B) the air temperature. • C) its frequency. • D) all of these. • E) none of these. • 4) Double the frequency of a sound and you halve its • A) speed. • B) amplitude. • C) wavelength. • D) all of these. • E) none of these.

  13. 5) A 340-hertz sound wave travels at 340 m/s in air with a wavelength of • A) 1 m. • B) 10 m. • C) 100 m. • D) 1000 m. • E) none of these. • 6) When the handle of a tuning fork is held solidly against a table, the sound becomes louder and the time the fork keeps vibrating • remains the same. • becomes shorter. • C) becomes longer.

  14. 7) Which type of radio wave produces the least static in a radio receiver? • A) FM • B) AM • C) Both have equal amounts of static. • 8) The wavelengths of sound that carry farther in air are relatively • short. • long. • C) no difference.

  15. 9) When the speed of sound near the ground is greater than higher in the air, sound tends to be bent • downward. • B) upward. • 10) An explosion occurs 34 km away. Since sound travels at 340 m/s, the time it takes for the sound to reach you is • A) 0.1 second. • B) 1 second. • C) 10 seconds. • D) 20 seconds. • E) more than 20 seconds.

  16. 11) The phenomenon of beats results from sound • A) reflection. • B) refraction. • C) interference. • D) all of these. • E) none of these. • 12) The explanation for refraction must involve a change in • A) speed. • B) wavelength. • C) frequency. • D) all of these. • E) none of these.

  17. 13) A 1056-hertz tuning fork is sounded at the same time a piano note is struck. You hear three beats per second. What is the frequency of the piano string? • A) 1053 hertz • B) 1056 hertz • C) 1059 hertz • D) 2112 hertz • E) not enough information given to determine • 14) The least amount of energy is required to produce forced vibration in an object • A) below its natural frequency. • B) above its natural frequency. • C) at its natural frequency.

  18. 15) Double the frequency of sound and you also double its • speed. • B) wavelength. • C) amplitude. • D) all of these • E) none of these. • 16) Inhaling helium increases the pitch of your voice. The reason for this is that sound travels • A) slower in helium than in air. • B) the same speed in helium, but the wavelength is greater. • C) faster in helium than in air.

  19. -- Answers -- MULTIPLE CHOICE. The one alternative that best completes the statement or answers the question.

  20. Chapter 20 1) Answer: A 2) Answer: D 3) Answer: B 4) Answer: C 5) Answer: A 6) Answer: B 7) Answer: A 8) Answer: B 9) Answer: B 10) Answer: E 11) Answer: C 12) Answer: A 13) Answer: E 14) Answer: C 15) Answer: E 16) Answer: C

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