Sound and Light

What are vibrational frequencies that range beyond 20,000 Hz?

• Ultrasonic frequencies

• Infrasonic frequencies

What part of the ear collects sound waves and focuses them into the ear canal?

(a)  

What type of waves are sound waves?

• Electromagnetic waves

• Mechanical waves

Vibrations of the medium create a series of crest and trough which results to transverse waves

• True

• False

Sound is the slowest in matter that is closely packed like solid and fastest in gas.

• True

• False

High temperature brings much faster sound. Increased humidity, on the other hand makes sound travel slower.

• True

• False

As pressure is increased, speed is also increased.

• True

• False

Solid tend to be highly elastic than gases and thus sound travel fastest in solids.

• True

• False

Humid air is more massive and is more inert than dry air. This condition brings lesser molecular interactions and eventually slower sound.

• True

• False

The higher the frequency the higher the pitch of the sound produced.

• True

• False