Per. 4
Lecture Quiz 29-1:
Middle C on the piano is 256 Hz. The speed of
sound in air is about 330 m/s. What is the
wavelength of this sound wave?
A.
B.
C.
D.
4.7 m
1.3 m
0.75 m
0.87
Per. 4
Lecture Quiz 29-2:
Why does sound travel faster in Hydrogen gas
than air?
A. Because Hydrogen molescules
are less massive than air
B. Because Hydrogen is more
elastic
C. Because air is more elastic
D. Because air does not burn
Per. 4
Lecture Quiz 29-3:
The frequency of a train whistle goes down as it
passes by you. This means that:
A. The speed of the sound wave is
changing.
B. The temperature of the air is changing
due to the heat from the train.
C. The wavelength of the sound wave is
changing.
D. The frequency of the train’s whistle, as
heard by the engineer, is changing.
Per. 5
Lecture Quiz 29-1:
A above middle C on the piano is 440 Hz. The
speed of sound in air is about 330 m/s. What is
the wavelength of this sound wave?
A.
B.
C.
D.
4.7 m
1.3 m
0.75 m
0.87
Per. 5
Lecture Quiz 29-2:
Why does sound travel slower in air than
Hydrogen gas ?
A. Because Hydrogen molecules
are more massive than air
B. Because Hydrogen is more
elastic
C. Because air molecules are more
massive than hydrogen
D. Because air does not burn
Per. 5
Lecture Quiz 29-3:
The frequency of a train whistle goes down as it
passes by you. This means that:
A. The speed of the sound wave is
changing.
B. The temperature of the air is changing
due to the heat from the train.
C. The frequency of the train’s whistle, as
heard by the engineer, is changing.
D. The wavelength of the sound wave is
changing.
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