Unit 8 Quiz 2

Sound waves radiate in ____________ waves.

• spherical

• straight

• angled

• diverse

Sounds below 20 Hz are called _____.

• Infrasonic

• Sonic

• Ultrasonic

• Protosonic

Tags

NGSS.HS-PS4-1

Sounds above 20,000 Hz are called _____.

• Infrasonic

• Sonic

• Ultrasonic

• Protosonic

Tags

NGSS.HS-PS4-1

An ambulance is moving away from you at 25 m/s. Its siren has a frequency of 750 Hz. What frequency will you perceive the siren's sound to be? Use 346 m/s for the speed of sound.

• 699 Hz

• 5421 Hz

• 21 Hz

• 154 Hz

Tags

NGSS.HS-PS4-1

The natural vibration of an object to a range of frequencies of sound is called beats.

• True

• False

Loudness is measured in decibels.

• True

• False

A piano tuner is tuning a string which should have a frequency of 440 Hz. He knows the pitch is too high and he hears 5 beats per second. What is the frequency of the piano string?

• 445

• 435

• 325

• 355

Tags

NGSS.HS-PS4-1

According to Faraday's law, a varying electric field creates a(n) _____.

• magnetic field

• electric charge

• bigger sized atom

• available electrons

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

According to Maxwell's law, a varying magnetic field induces a(n) _____.

• magnetic field

• electric charge

• bigger sized atom

• available electrons

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

The formulas relating frequency, wavelength, and speed of an electromagnetic wave are _____ and _____.

• v = fλ

• c =fλ

• f =ma

• w = fd

• M = d / V

Tags

NGSS.HS-PS4-1