Physics_B_071425

What is the SI unit of frequency?

• Meter

• Hertz

• Second

• Newton

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NGSS.HS-PS4-1

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NGSS.HS-PS4-1

If a sound wave has a frequency of 550 Hz, what does this number represent?

• The number of sound waves per second

• The number of wing beats per second

• The speed of the sound wave

• The wavelength of the sound wave

What is the typical upper limit of human hearing in terms of frequency?

• 2,000 Hz

• 20,000 Hz

• 200,000 Hz

• 200 Hz

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NGSS.HS-PS4-1

If the velocity of a wave is constant, what happens to the wavelength if the frequency increases?

• Wavelength increases

• Wavelength decreases

• Wavelength stays the same

• Wavelength becomes zero

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NGSS.HS-PS4-1

A fly beats its wings 550 times per second. What is the frequency of the sound produced?

• 550 Hz

• 5.5 Hz

• 0.55 Hz

• 55 Hz

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NGSS.MS-PS4-1

Which of the following best describes an infrasonic sound wave?

• A sound wave with a frequency above 20,000 Hz

• A sound wave with a frequency below 20 Hz

• A sound wave with a frequency between 20 Hz and 20,000 Hz

• A sound wave with a wavelength less than 1 meter

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NGSS.HS-PS4-1

If the speed of sound in air is 345 m/s, what is the wavelength of a 345 Hz sound wave?

• 1 m

• 10 m

• 0.1 m

• 100 m

An elephant produces a 10 Hz sound wave with a wavelength of 34.5 meters. What is the speed of this sound wave?

• 3.45 m/s

• 345 m/s

• 34.5 m/s

• 0.345 m/s

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NGSS.MS-PS4-2

If a sound wave has a frequency of 20,000 Hz and the speed of sound in air is 345 m/s, what is its wavelength?

• 0.01725 m

• 0.1725 m

• 1.725 m

• 17.25 m

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NGSS.MS-PS4-2