Frequency of Waves

The speed of sound in air is 340 m/s.  The frequency of the sound waves generated by my voice is 720 Hz.  Calculate the wavelength of sound of my voice.

• 380 m

• 0.472 m

• 2.11 m

• 244,800 m

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NGSS.MS-PS4-1

When the frequency of a wave increases, what happens to the wavelength?

• The wavelength is not directly affected by the frequency of a wave.

• The wavelength increases.

• The wavelength decreases.

• More specific information is needed to form a conclusion about the wavelength.

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NGSS.HS-PS4-1

Which wave in the diagram has the greatest frequency?

• 1

• 2

• 3

• 4

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NGSS.MS-PS4-1

The number of wavelengths that pass a point each per second is:

• frequency

• period

• longitudinal 

• transverse wave 

High pitched waves would have wavelengths that are...

• at a rarefaction

• far apart

• close together

• at the trough

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NGSS.MS-PS4-1

regular disturbances that carry energy through matter or space

• crest

• energy

• wave

• trough

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NGSS.MS-PS4-1

NGSS.MS-PS4-2

When the sound source moves, the frequency changes
ex. police car siren sounding lower pitch after the car passes

• pitch

• frequency

• Doppler Effect

• medium

What is the relationship between frequency and energy of a wave?

• Energy is directly proportional to frequency.

• Energy is inversely proportional to frequency.

• Energy is independent of frequency.

• Energy is equal to frequency.

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NGSS.MS-PS4-2

Which of the following units is used to measure the frequency of a wave?

• Hertz (Hz)

• Newton (N)

• Joule (J)

• Pascal (Pa)

Tags

NGSS.HS-PS4-1

If a wave has a frequency of 10 Hz, how many cycles does it complete in one second?

• 1 cycle

• 5 cycles

• 10 cycles

• 20 cycles

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NGSS.HS-PS4-1