AnswersPhysicsWaves and Sound

Practice Test Answers

12 verified answers
1
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Which conclusion can be made based on the information in the table?

A
Frequency and wavelengths can vary directly to produce the same wave speed.
B
Wave speed and wavelengths can vary inversely to produce the same frequency.
C
Frequency and wave speed can vary directly to produce the same wavelength.
D
Wavelengths and frequency can vary inversely to produce the same wave speed.
2
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Which profession has the greatest risk of sound damage to the ear?

A
librarian
B
teacher
C
woodworker
D
truck driver
3

What best describes the motion of the medium particles in a longitudinal wave?

A
The medium moves in all directions.
B
The medium vibrates parallel to the direction of the wave.
C
The medium vibrates as it moves in a circular path around the wave.
D
The medium does not move.
4

What best explains why a person can become sunburned by spending too much time at the beach?

A
Sunlight is an electromagnetic wave that gains energy as it travels through air to reach the person.
B
Sunlight is an electromagnetic wave carrying energy that is absorbed by the skin.
C
Sunlight is a mechanical wave that vibrates the skin particles to produce heat.
D
Sunlight is a mechanical wave, and its frequency matches the natural frequency of skin to make heat.
5

A sound wave is produced when a medium begins to [Dropdown 1] .

Answer:

vibrate

6

A boy yells in a narrow valley. The sound reflects off of a boulder that is 80 m away. How long will it take to hear the echo if the speed of a sound wave is 320 m/s ? open paren speed is equal to distance over time close paren

A
0 point 2 5 seconds
B
4 point 0 seconds
C
2 point 0 seconds
D
0 point 5 0 seconds
7

Which property makes radio waves ideal for carrying and transmitting data?

A
having long wavelengths
B
transferring high amounts of energy
C
traveling faster than the speed of light
D
having high frequencies
8

Which best describes the amplitude of a sound wave and distance from the source where it will be measured with an intensity of 16 cap i sub o ?

A
Increase the amplitude to 8 x sub o and stand 2 meters from the source.
B
Increase the amplitude to 4 x sub o and stand 8 meters from the source.
C
Increase the amplitude to 2 x sub o and stand 2 meters from the source.
D
Increase the amplitude to 4 x sub o and stand 10 meters from the source.
9

The diagram best represents which type of modulation?

A
AM
B
pulse
C
FM
D
phase
10

Which label identifies a rarefaction?

A
A
B
B
C
C
D
D
11

Which animals can hear a sound wave that has 18 comma 500 cycles in 0 point 7 5 seconds? Choose three correct answers.

A
fish
B
cats
C
moths
D
birds
E
bats
F
humans
G
crickets
12

What best describes white light as it travels through a prism? Choose four correct answers.

A
The light bends in the prism.
B
The white light breaks into its component colors.
C
The light slows down.
D
Light reflects off of the surface of the prism.
E
The speed of light in the prism is 3 point 0 times 10 to the 8th power m/s .

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