Physics Quiz 10 (Ch 12)

A sound wave is an example of a(n) _____ wave.

• transverse

• longitudinal

• crest-and-trough

• electromagnetic

A sound wave consists of a series of

• compressions and rarefactions.

• longitudes and latitudes.

• hills and valleys.

• perpendicular vibrations.

The human perception of pitch depends on a sound’s

• velocity.

• wavelength.

• frequency.

• amplitude.

Sound generally travels faster through solids than through gases because the particles (atoms or molecules) of a solid are _____ than the particles of a gas.

• closer together

• heavier

• warmer

• larger

When you hear the sound from a vehicle that is moving toward you, the pitch is higher than it would be if the vehicle were stationary. The pitch sounds higher because the

• sound waves arrive more frequently.

• sound from the approaching vehicle travels faster.

• wavelength of the sound waves becomes greater.

• amplitude of the sound waves increases.

The measured intensity of sound depends on both the distance from the source and the _____ of the sound source.

• frequency

• power

• pitch

• wavelength

The perceived loudness of a sound is measured in

• watts per square meter.

• watts.

• decibels.

• hertz.

The decibel level at the threshold of human hearing is

• -1 dB.

• 0 dB.

• 1 dB.

• 10 dB.

When a string on an acoustic guitar is struck, the hollow body of the guitar vibrates at the same frequency as a result of

• forced vibration.

• compressions.

• resonance.

• plane waves.

Resonance occurs when a force causes an object to vibrate at

• a large amplitude.

• a low pitch.

• any frequency.

• its natural frequency.