Physics Practice Questions - Waves and Sound - gdn.edu

c

18) Some of a wave's energy dissipates as heat. In time, this will reduce the wave's A) period. B) frequency. C) amplitude. D) wavelength. E) speed.

c

24) The source of all sounds is something that is A) undergoing simple harmonic motion. B) moving. C) vibrating. D) a net emitter of energy. E) accelerating.

a

25) A sound source of high frequency emits a high A) pitch. B) speed. C) amplitude. D) all of these E) none of these

d

26) A sound wave is a A) standing wave. B) shock wave. C) transverse wave. D) longitudinal wave. E) none of these

b

27) Compressions and rarefactions are characteristic of A) transverse waves. B) longitudinal waves. C) both of these D) neither of these

b

28) Sound travels faster in A) a vacuum. B) steel. C) water. D) air. E) Sound travels at about the same speed in all of these

d

29) Sound waves cannot travel in A) water. B) air. C) steel. D) a vacuum. E) Sound can travel in all of these.

a

3) Which of the following is not a transverse wave? A) sound B) radio C) light D) all of these E) none of these

a

30) Sound travels faster in air if the air is A) warm. B) cold. C) neither warm nor cold.

b

31) When the speed of sound near the ground is greater than higher in the air, sound tends to be bent A) downward. B) upward.

c

32) Refraction of sound can occur in A) water. B) air. C) both D) neither

c

33) The energy of sound in air eventually becomes A) cancelled by destructive interference. B) weaker and weaker until it disappears. C) increased internal energy of the air. D) cancelled by both destructive and constructive interference.

b

34) The frequencies of sound that carry farther in air are relatively A) high. B) low. C) no difference

a

35) A bass fiddle is louder than a harp because of its A) sounding board. B) thicker strings. C) lower pitch. D) all of these E) none of these

b

36) The object with the natural frequency of higher pitch is a A) large bell. B) small bell.

b

37) The least amount of energy is required to produce forced vibration in an object A) above its natural frequency. B) at its natural frequency. C) below its natural frequency.

a

38) Sound waves can interfere with one another so that no sound results. A) True B) False

a

39) On some days, air nearest the ground is colder than air that is higher up. On one of these days, sound waves A) tend to be refracted downward. B) tend to be refracted upward. C) travel without refraction.

c

40) Sound refraction depends on the fact that the speed of sound is A) proportional to frequency. B) constant. C) variable. D) inversely proportional to wavelength. E) none of these

e

41) An explosion occurs 34 km away. Knowing that sound travels at 340 m/s, the time it takes for the sound to reach you is A) 10 s. B) 0.1 s. C) 20 s. D) 1 s. E) more than 20 s.

A

42) Repeatedly tap the side of a drinking glass with a spoon while filling it with water and you will notice that the pitch of the sound A) decreases. B) remains relatively constant. C) increases.

b

43) The pitch of a musical sound depends on the sound wave's A) wavelength. B) frequency. C) amplitude. D) speed. E) all of these

c

44) As we become older, the frequency range of human hearing A) increases. B) remains relatively constant. C) decreases.

c

45) The loudness of a musical sound is a measure of the sound wave's A) frequency. B) wavelength. C) amplitude. D) speed. E) all of these

b

46) Reverberation is a phenomenon you would be most likely to hear if you sing in the A) desert. B) shower.

c

47) All other things being the same, strings that have more mass than other strings will produce A) higher frequency notes. B) the same frequency notes. C) lower frequency notes.

c

49) Relative to ultraviolet waves, the wavelength of infrared waves is A) the same. B) shorter. C) longer.

e

50) Which of the following is fundamentally different from the others? A) gamma rays B) X rays C) radio waves D) light waves E) sound waves