A sound wave has a certain amplitude and a certain frequency.
A second sound wave is quieter and lower in pitch than the first sound wave.
The second wave has .......
A a larger amplitude and a greater frequency.
B a larger amplitude and a smaller frequency.
C a smaller amplitude and a greater frequency.
D a smaller amplitude and a smaller frequency.
What is the approximate range of hearing of a healthy human ear?
A 2.0 Hz to 2.0 kHz
B 2.0 Hz to 20 kHz
C 20 Hz to 2.0 kHz
D 20 Hz to 20 kHz
A singer sings two notes. The first note is louder and lower in pitch than the second note.
Which statement about the two notes is correct?
A The first note has a larger amplitude and a larger frequency than the second note.
B The first note has a larger amplitude and a smaller frequency than the second note.
C The first note has a smaller amplitude and a larger frequency than the second note.
D The first note has a smaller amplitude and a smaller frequency than the second note.
Which range of wave frequencies includes only sounds that can be heard by a human with normal hearing?
A 3.0 Hz to 300 Hz
B 30 Hz to 3000 Hz
C 300 Hz to 30 000 Hz
D 3000 Hz to 300 000 Hz
A candle flame is placed in front of a loudspeaker.
The loudspeaker produces a sound wave that causes air particles to vibrate. The vibrating air particles make the candle flame vibrate in the same direction as the air particles.
Sound wave P has a greater amplitude and a larger wavelength in air than sound wave Q.
How do the loudness and pitch of P compare with the loudness and pitch of Q?
A P is louder and higher in pitch than Q.
B P is louder and lower in pitch than Q.
C P is quieter and higher in pitch than Q.
D P is quieter and lower in pitch than Q.
An echo-sounder on a ship produces a pulse of sound. The echo is received by the echo-sounder after two seconds.
The speed of sound in sea-water is 1500 m / s.
What is the depth of the sea-water below the ship?
A quiet sound is produced by a loudspeaker. The loudness of the sound is increased.
Which property of the sound wave is increased?
A man holding a starting pistol stands 640 m away from a spectator.
The spectator hears the sound of the starting pistol 2.0 s after seeing the flash from the pistol.
Using this information, what is the speed of sound in air?
Sounds are produced by vibrating objects. A certain object vibrates but a person nearby cannot hear any sound.
Which statement could explain why nothing is heard?
A The amplitude of the sound waves is too large.
B The frequency of the vibration is too high.
C The sound waves are transverse.
D The speed of the sound waves is too high.
Two sounds X and Y are produced by loudspeakers.
The amplitude and frequency of each sound wave is given below.
X : amplitude = 1.3 mm; frequency = 475 Hz
Y : amplitude = 2.0 mm; frequency = 235 Hz
How does sound Y compare with sound X?