AnswersCrowley Credit Recovery Physics BIntroduction to Waves

Wave Properties Answers

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1
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The ______ is the time it takes for a wave to complete one cycle.

A
trough
B
period
C
frequency
D
hertz
2
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A transverse wave with a frequency of 125 Hz is traveling in the x-direction.

Question illustration
A
0.42 seconds
B
2.0 seconds
C
2.4 seconds
D
4.8 seconds
3

What best describes the relationship between wavelength and frequency in an electromagnetic wave?

A
always equal
B
no relationship
C
directly proportional
D
inversely proportional
4

Which change will decrease the speed of a sound wave traveling through a gaseous matter?

A
replacing the gaseous matter with a liquid
B
replacing the gaseous matter with a solid
C
decreasing the temperature of the matter
D
increasing the temperature of the matter
5

A wave is produced in a rope. The wave has a speed of 33 m/s and a frequency of 22 Hz.

A
0.67 m
B
0.75 m
C
1.5 m
D
3.0 m
6

On a cold day, the speed of sound in air is 330 m/s. A note with a frequency of 1,320 Hz is played on an instrument. What is the wavelength of that sound wave?

A
0.25 m
B
4 m
C
1,650 m
D
435,600 m
7

A sound wave has a frequency of 425 Hz. What is the period of this wave?

A
0.00235 seconds
B
0.807 seconds
C
425 seconds
D
850 seconds
8

The speed of sound in ice, water, and steam is shown.

Question illustration
A
Sound travels fastest in ice because energy is easier to transfer when the molecules are close together.
B
Sound travels slowest in steam because the sound has to move around the gas molecules that are far apart.
C
Sound travels fastest in ice because the temperature of solids is always greater, so the heat transfers the sound energy.
D
Sound travels slowest in steam because the pressure is so great the sound cannot travel though the steam particles.
9

All parts of the electromagnetic spectrum travel at a speed of 3 × 108 m/s when traveling through no medium. A "vacuum” means that there is no medium, such as a tube without any air in it. Therefore, 3 × 108 m/s is said to be the speed of light in a vacuum.

A
Wavelength doubles and speed doubles.
B
Wavelength doubles and speed stays the same.
C
Wavelength divides in half and speed doubles.
D
Wavelength divides in half and speed stays the same.
10

Sound travels slowest through what temperature of water?

A
20°C
B
40°C
C
60°C
D
80°C

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