Wave Interactions Answers

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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
2
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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.
3

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
4

Julia performs an experiment to measure the wavelength of four different waves and records her data in the table below.Which accurately ranks the waves from the lowest energy wave to the highest energy wave?

Question illustration
A
1 → 4 → 3 → 2
B
2 → 3 → 4 → 1
C
3 → 2 → 4 → 1
D
1 → 4 → 2 → 3
5

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.
6

Which are examples of a medium?

A
water and air
B
amplitude and wavelength
C
crests and troughs
D
compressions and rarefactions
7

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

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