Ch 9 & 10 Review

Scientists and engineers may recommend carpets and draperies for the walls of a concert hall to reduce excess ______.

• echolocation

• reverberation

• frequency

• amplitude

Tags

NGSS.MS-PS4-2

A system of using the reflection of underwater sound waves is ___.

• acoustics

• radar

• sonar

• resonance

Tags

NGSS.HS-PS4-5

An ocean wave has a frequency of 2.0 Hz with a wavelength of 10 m. What is the velocity of the wave?

• 5 m/s

• 10 m/s

• 20 m/s

• 40 m/s

Tags

NGSS.HS-PS4-1

If you pass a building with a siren sounding, as you move away from the building, the sirens will sound ____.

• higher

• lower

• the same

• depends on the speed

Tags

NGSS.HS-PS4-1

The energy a wave carries is measured by its ____.

• wavelength

• frequency

• amplitude

• speed

____ is made of sounds that are irregular and disorganized.

• The Doppler effect

• Pitch

• Music

• Noise

Waves in which the particles of the medium move only in the same direction as the motion of the wave are ____ waves.

• transverse

• compressional

• water

• seismic

Most musical instruments produce sound by having a structure that vibrates linked to a ____.

• voice box

• resonator

• hollow tube

• membrane

Tags

NGSS.HS-PS4-5

Hearing damage begins to occur at sound levels of about ____ decibels.

• 85
• 0

• 25

• 40

Tapping the surface of a pan of water generates 17.5 waves per second. If the wavelength of each wave is 45 cm, what is the speed of the waves?

• 7.9 m/s

• 17.5 m/s

• 38.9 m/s

• 787.5 m/s

Tags

NGSS.HS-PS4-1