Waves and Sound Review

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Wave Math

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The names for the top and bottom points of a transverse

wave.

ANSWER

Crest and trough

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The time it takes for one cycle to occur.

Answer

period

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A single unit of periodic motion

Answer

cycle

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Distance from the crest of one wave to the crest of the next

Answer

wavelength

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Unit of measurement for frequency

Answer

Hertz (Hz)

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This happens when two or more waves interact

Answer

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Interference

The type of wave that oscillates perpendicular to the

direction the wave travels.

Answer

transverse

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Occurs when two waves interact with each other to make a wave of smaller

amplitude

Answer

Destructive interference

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Occurs when two waves interact to form a bigger wave

Answer

Constructive Interference

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The type of wave that travels in the same direction as the oscillations

Answer

longitudinal

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Give an example of a transverse Wave

Answer

Ocean waves, electromagnetic waves

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Give an example of a longitudinal wave

Answer

Sound waves

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When a door is only slightly opened, sound will pass from one room to another due to

mainly _________________.

Answer

diffraction

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What occurs when sound waves hit an acoustic tile in an

auditorium?

Answer

absorption

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5 meters

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DAILY DOUBLE!!!!

QUESTION

Give the units for the variables used in v= f

V= m/s = mf = hertz

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The unit for measuring the loudness of sound

Answer

Decibel (dB)

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True or False: The speed of sound is about 343 m/s

Answer

True

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True or False: Sound waves are slower than light waves

Answer

True

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True or False: Sound waves travel faster in outer space than in air.

Answer

FalseSound depends on three things: a vibrating source to create the sound waves, a medium (such as air) to carry the waves, and a receiver to hear them. Sound waves can't travel through a

vacuum.

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Give the correct order from slowest to fastest for the

speed of sound through these three media.

[water, air, wood]

Answer

Some mediums are better at conducting sound than others. Like all gasses, air is a poor medium for sound waves. Liquids, such as water, are better, and rigid, solid substances, such as iron and stone, are even better, while rubber, cork, and cotton are some examples of poor

conductors.

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(slowest)Air, water, wood (fastest)

As you decrease the temperature & pressure of air,

does the speed of sound increase or decrease?

Answer

Decreases!

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As the wavelength decreases, the frequency of a wave

________________

Answer

increases

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As the loudness of a sound increases, the amplitude of the wave ______________

Answer

increases

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The frequency increases when the source and the observer approach each other and decreases when they move apart.

Answer

The Doppler Effect

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Which of the following sounds has the shortest wavelength?A)Thunder @ 75 hzB) a female soprano singer @2000 hzC) a man’s voice @ 500 hz

Answer

B) a female soprano singer @2000 hz

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What is the equation you would use to solve for wavelength of a wave?

Answer

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V / f =

A wave made by dropping a ball in water has a frequency

of 2 Hz and a speed of 10 m/s. What is the wavelength

of this wave?

Answer

5 m

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A tuning fork has a frequency of 200 hz and the wavelength of sound produced is 10m. Calculate the velocity of the

wave.

Answer

2000 m/s

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An ocean wave is moving toward the shore with a velocity of

15m/s. If its frequency is 5hz, what is the wavelegth?

Answer

3 m

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A rope is moved with a speed of 120 m/s. If the length of the

wave is 10 m, what is the frequency of the wave?

Answer

12 hz

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