AnswersFL-2003310-Physical Science CRLab: Thermal Energy Transfer

Properties of Waves Answers

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What is the speed of a wave with a frequency of 2 Hz and a wavelength of 87 m?

A
0.023 m/s
B
43.5 m/s
C
89 m/s
D
174 m/s
2
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A wave of infrared light has a speed of 6 m/s and a wavelength of 12 m. What is the frequency of this wave?

A
0.5 Hz
B
2.0 Hz
C
18 Hz
D
72 Hz
3

Which describes the amplitude of a wave when it carries more energy?

A
It is higher.
B
It is lower.
C
It is darker.
D
It is lighter.
4

Voices of swimmers at a pool travel 400 m/s through the air and 1,600 m/s underwater. The wavelength changes from 2 m in the air to 8 m underwater. How has the change in media affected the frequency of the wave?

A
It increased.
B
It decreased.
C
It stayed the same.
D
It cannot be calculated.
5

Which best describes the relationship between the terms “frequency,” “wavelength,” and “hertz”?

A
Wavelength is the number of frequencies, which is measured in hertz.
B
Frequency is the number of wavelengths, which is measured in hertz.
C
Wavelength is measured from frequency to hertz.
D
Frequency is measured from wavelength to hertz.
6

Marco is conducting an experiment. He knows the wave that he is working with has a wavelength of 32.4 cm. If he measures the frequency as 3 hertz, which statement about the wave is accurate?

A
The wave has traveled 32.4 cm in 3 seconds.
B
The wave has traveled 32.4 cm in 9 seconds.
C
The wave has traveled 97.2 cm in 3 seconds.
D
The wave has traveled 97.2 cm in 1 second.
7

What will most likely happen if a sound wave moves from the air through a solid?

A
It will increase in frequency.
B
It will decrease in speed.
C
It will increase in speed.
D
It will decrease in wavelength.
8

Which equation could be rearranged to calculate the frequency of a wave?

A
wavelength = frequency/speed
B
frequency = wavelength/speed
C
wavelength = speed/frequency
D
frequency = speed x wavelength
9

A sound wave traveling downward with a speed of about 4,000 m/s suddenly slows to 1,500 m/s not far below the Earth’s surface.What has the sound wave most likely encountered?

A
a different kind of rock
B
an underground lake
C
an open cavity
D
a pile of dinosaur bones
10

What is the speed of a wave with a wavelength of 3 m and a frequency of .1 Hz?

A
0.03 m/s
B
0.3 m/s
C
3.1 m/s
D
30 m/s

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