Sound Generator

• A

• B

• C

• D

Tags

NGSS.MS-PS4-1

Which of the frequency ranges below is completely audible by a human who has average hearing?

• 200 Hz to 200 kHz

• 5 Hz to 50 kHz

• 50 Hz to 5 kHz

• 50 kHz to 50 MHz

Tags

NGSS.HS-PS4-1

A teacher uses a piece of lab equipment called a signal generator, which he connects to a speaker. This apparatus can be used to make a particularly irritating noise.

The teacher makes four sounds of different frequencies with the signal generator. Which one can be heard by the student?

• 10 Hz

• 30 kHz

• 440 Hz

• 120 kHz

Tags

NGSS.HS-PS4-1

Echoes can sometimes be heard where a person is surrounded by distant, hard, flat surfaces.

In Greek mythology, Echo is a mountain nymph who was cursed by Hera to be only able to repeat the last words she heard. This ends tragically when she falls in love with Narcissus who, alas, loves only his own reflection.

In Physics, which wave property causes an echo?

• Reflection

• Refraction

• Diffraction

• Dispersion

Tags

NGSS.MS-PS4-2

• A

• B

• C

• D

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-4

NGSS.MS-PS4-1

• 349 m/s

• 330 m/s

• 258 m/s

• 698 m/s

Tags

NGSS.MS-PS4-1

NGSS.MS-PS4-2

• A

• B

• C

• D

Tags

NGSS.MS-PS4-1

• A

• B

• C

• D

A sound wave has a certain amplitude and a certain frequency.

A second sound wave is quieter and lower in pitch than the first one.

The second wave has

• a larger amplitude and a greater frequency

• a larger amplitude and a smaller frequency

• a smaller amplitude and a greater frequency

• a smaller amplitude and a smaller frequency

Tags

NGSS.MS-PS4-1

• A

• B

• C

• D

Tags

NGSS.MS-PS4-1

NGSS.MS-PS4-2