Sound Quiz - Assessment

1.

Multiple Choice

30 sec

1 pt

Sound in air can be best described as a

transverse pressure wave in air

longitudinal wave of compressions and rarefactions in air

polarized transverse wave in air

transgressive displacement wave in air

2.

Multiple Choice

30 sec

1 pt

The speed of sound in air is approximately

140 m/s

340 m/s

1000 m/s

300,000,000 m/s

3.

Multiple Choice

30 sec

1 pt

We set up a loudspeaker at the front of the classroom. The sound produced by the speaker will cause the air moleciles to

vibrate horizontally backward and forward

vibrate vertically up and down

fly across the room at the speed of sound

vibrate horizontally and vertically

4.

Multiple Choice

30 sec

1 pt

The "pitch" of a musical noteis normally given in terms of its

speed

wavelength

frequency

amplitude

5.

Multiple Choice

30 sec

1 pt

the loudness of a note is related to its

period

frequency

speed

amplitude

6.

Multiple Choice

30 sec

1 pt

The normal frequency of hearing in a young person, who has not been to to many Metallica concerts, is about

10 Hz to 10 kHz

20 Hz to 20 kHz

50 Hz to 50 kHz

100 Hz to 100 kHz

7.

Multiple Choice

30 sec

1 pt

The sound of a flute is different to the sound of a clarinet playing the same note, at the same loudness, because

they produce different fundamental frequencies

they produce different harmonics

they produce different amplitudes

one produces transverse waves and the other produces longitudinal waves

8.

Multiple Choice

1 min

1 pt

A sound wave of 5000 Hz is traveling through water, where it's speed is 1500 m/s. What is the wavelength of the sound?

0.15 m

0.3 m

1.5 m

3.0 m

9.

Multiple Choice

30 sec

1 pt

Ultrasound travelling through steel has a wavelength of 0.2 m and a frequency of 24,500 Hz. What is the speed of sound in steel?

49 m/s

490 m/s

4,900 m/s

49,000 m/s

10.

Multiple Choice

1 min

1 pt

A man is yodeling in the Rockies (this does not happen every day). The echo of the yodel arrives back at the man, 15 s after the original yodel. How far is the man from the mountain, if the speed of sound on this day is 320 m/s

1200 m

2400 m

3600 m

4800 m

11.

Multiple Choice

1 min

1 pt

Two sounds of the same amplitude but different frequencies are played on a banjo. One has a frquency of 340 Hz and the other a frequency of 420 Hz. What is the beat frequency?

760 Hz

100 Hz

80 Hz

10 Hz

12.

Multiple Choice

1 min

1 pt

A piano tuner is trying to get two stringsin tune. One string vibrates at 440 Hz. The beat frequency is 3 Hz. Which of the following is a possible frquency for the other string?

397 Hz

407 Hz

437 Hz

447 Hz

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