Property of Sound

What is Sound?

• A form of energy that is transferred from one point to another as a longitudinal wave

• A form of energy that is transferred from a fixed point as a longitudinal wave

• A form of energy that is transferred from one point to a fixed point as a longitudinal wave

• A form of energy that is transferred from one point to another as a Electromagnetic wave

Sound is produced by .... sources placed in a .... .

• vibrating, medium

• vibrating, object

• noise, medium

• noise, object

As sound is a longitudinal wave, the direction of vibration of air molecules is .... to the direction in which the wave travels.

• parallel

• opposite

• perpendicular

• the same

Compressions are regions where air pressure is ....

• higher

• lower

• the same

• normal

Rarefractions are regions where air pressure is ....

• higher

• lower

• the same

• normal

Sound cannot travel through ....

• Air

• Vacuum

• Radiation

• Atoms

Sound waves travel slowest in ...

• solids

• gas

• liquid

Sound waves travel fastest in ...

• solids

• gas

• liquid

An Echo is ....

• The repetition of a sound due to the reflection of sound.

• The repetition of a sound due to the repetition of sound.

• The reflection of a sound due to the repetition of sound.

• The reflection of a sound due to the reflection of sound.

Echoes can be used to ....

• Measure large distances

• Detect the location of objects (i.e echolocation)

• Locate close objects

• Destroy enemies